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1. First observation and study of the K ± → π 0 π 0 μ ± ν decay

Author

The NA48/2 collaboration, J. R. Batley, G. Kalmus, C. Lazzeroni, D. J. Munday, M. W. Slater, S. A. Wotton, R. Arcidiacono, G. Bocquet, N. Cabibbo, A. Ceccucci, D. Cundy, V. Falaleev, M. Fidecaro, L. Gatignon, A. Gonidec, W. Kubischta, A. Maier, A. Norton, M. Patel, A. Peters, E. Monnier, E. Swallow, R. Winston, P. Rubin, A. Walker, P. Dalpiaz, C. Damiani, M. Fiorini, M. Martini, F. Petrucci, M. Savrié, M. Scarpa, H. Wahl, W. Baldini, A. Cotta Ramusino, A. Gianoli, M. Calvetti, E. Celeghini, E. Iacopini, M. Lenti, G. Ruggiero, A. Bizzeti, M. Veltri, M. Behler, K. Eppard, M. Hita-Hochgesand, K. Kleinknecht, P. Marouelli, L. Masetti, U. Moosbrugger, C. Morales Morales, B. Renk, M. Wache, R. Wanke, A. Winhart, D. Coward, A. Dabrowski, T. Fonseca Martin, M. Shieh, M. Szleper, M. Velasco, M. D. Wood, G. Anzivino, E. Imbergamo, A. Nappi, M. Piccini, M. Raggi, M. Valdata-Nappi, P. Cenci, M. Pepe, M. C. Petrucci, F. Costantini, N. Doble, L. Fiorini, S. Giudici, G. Pierazzini, M. Sozzi, S. Venditti, G. Collazuol, L. Di Lella, G. Lamanna, I. Mannelli, A. Michetti, C. Cerri, R. Fantechi, B. Bloch-Devaux, C. Cheshkov, J. B. Chèze, M. De Beer, J. Derré, G. Marel, E. Mazzucato, B. Peyaud, B. Vallage, M. Holder, M. Ziolkowski, S. Bifani, M. Clemencic, S. Goy Lopez, C. Biino, N. Cartiglia, F. Marchetto, H. Dibon, M. Jeitler, M. Markytan, I. Mikulec, G. Neuhofer, L. Widhalm, S. Balev, P. L. Frabetti, E. Gersabeck, E. Goudzovski, P. Hristov, V. Kekelidze, A. Korotkova, V. Kozhuharov, L. Litov, D. Madigozhin, N. Molokanova, I. Polenkevich, Yu. Potrebenikov, S. Stoynev, and A. Zinchenko

Subjects
Branching fraction, Fixed Target Experiments, Rare Decay, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The NA48/2 experiment at CERN reports the first observation of the K ± → π 0 π 0 μ ± ν decay based on a sample of 2437 candidates with 15% background contamination collected in 2003–2004. The decay branching ratio in the kinematic region of the squared dilepton mass above 0.03 GeV2/c 4 is measured to be (0.65 ± 0.03) × 10 −6. The extrapolation to the full kinematic space, using a specific model, is found to be (3.45 ± 0.16) × 10 −6, in agreement with chiral perturbation theory predictions.

Published
2024
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2. Measurement of the K+ → π+γγ decay

Author

E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, V.W.S. Wong, D. Bryman, J. Fu, Z. Hives, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, B. De Martino, M. Perrin-Terrin, B. Döbrich, S. Lezki, A.T. Akmete, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, A. Mazzolari, I. Neri, A. Norton, F. Petrucci, M. Soldani, H. Wahl, L. Bandiera, A. Cotta Ramusino, A. Gianoli, M. Romagnoni, A. Sytov, E. Iacopini, G. Latino, M. Lenti, P. Lo Chiatto, I. Panichi, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, G. Tinti, F. Ambrosino, T. Capussela, M. Corvino, M. D'Errico, D. Di Filippo, R. Fiorenza, R. Giordano, P. Massarotti, M. Mirra, M. Napolitano, I. Rosa, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D'Agostini, M. Raggi, A. Biagioni, P. Cretaro, O. Frezza, E. Leonardi, A. Lonardo, M. Turisini, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, A. Briano Olvera, J. Engelfried, N. Estrada-Tristan, M.A. Reyes Santos, K.A. Rodriguez Rivera, P. Boboc, A.M. Bragadireanu, S.A. Ghinescu, O.E. Hutanu, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, M. Ceoletta, H. Danielsson, N. De Simone, F. Duval, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E.B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M.B. Brunetti, V. Duk, V. Fascianelli, J.R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Kenworthy, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, J. Sanders, A. Sergi, A. Sturgess, J. Swallow, A. Tomczak, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J.B. Dainton, R.W.L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, P. Rubin, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, S. Fedotov, K. Gorshanov, E. Gushchin, V. Kekelidze, D. Kereibay, S. Kholodenko, A. Khotyantsev, A. Korotkova, Y. Kudenko, V. Kurochka, V. Kurshetsov, L. Litov, D. Madigozhin, M. Medvedeva, A. Mefodev, M. Misheva, N. Molokanova, S. Movchan, V. Obraztsov, A. Okhotnikov, A. Ostankov, I. Polenkevich, Yu. Potrebenikov, A. Sadovskiy, V. Semenov, S. Shkarovskiy, V. Sugonyaev, O. Yushchenko, and A. Zinchenko

Subjects
Physics, QC1-999
Abstract

A sample of 3984 candidates of the K+→π+γγ decay, with an estimated background of 291±14 events, was collected by the NA62 experiment at CERN during 2017–2018. In order to describe the observed di-photon mass spectrum, the next-to-leading order contribution in chiral perturbation theory was found to be necessary. The decay branching ratio in the full kinematic range is measured to be (9.61±0.17)×10−7. The first search for production and prompt decay of an axion-like particle with gluon coupling in the process K+→π+a, a→γγ is also reported.

Published
2024
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3. Improved calorimetric particle identification in NA62 using machine learning techniques

Author

The NA62 collaboration, E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, W. Fedorko, T. Numao, Y. Petrov, B. Velghe, V. W. S. Wong, M. Yu, D. Bryman, J. Fu, Z. Hives, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, B. De Martino, M. Perrin-Terrin, A. T. Akmete, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, A. Mazzolari, I. Neri, A. Norton, F. Petrucci, M. Soldani, H. Wahl, L. Bandiera, A. Cotta Ramusino, A. Gianoli, M. Romagnoni, A. Sytov, E. Iacopini, G. Latino, M. Lenti, P. Lo Chiatto, I. Panichi, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, G. Tinti, F. Ambrosino, T. Capussela, M. Corvino, M. D’Errico, D. Di Filippo, R. Fiorenza, R. Giordano, P. Massarotti, M. Mirra, M. Napolitano, I. Rosa, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D’Agostini, M. Raggi, A. Biagioni, P. Cretaro, O. Frezza, E. Leonardi, A. Lonardo, M. Turisini, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, A. Briano Olvera, J. Engelfried, N. Estrada-Tristan, M. A. Reyes Santos, P. Boboc, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, M. Ceoletta, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E. B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M. B. Brunetti, V. Duk, V. Fascianelli, J. R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Kenworthy, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, J. Sanders, A. Sergi, A. Sturgess, J. Swallow, A. Tomczak, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J. B. Dainton, R. W. L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, P. Rubin, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, S. Fedotov, K. Gorshanov, E. Gushchin, V. Kekelidze, D. Kereibay, S. Kholodenko, A. Khotyantsev, A. Korotkova, Y. Kudenko, V. Kurochka, V. Kurshetsov, L. Litov, D. Madigozhin, M. Medvedeva, A. Mefodev, M. Misheva, N. Molokanova, S. Movchan, V. Obraztsov, A. Okhotnikov, A. Ostankov, I. Polenkevich, Yu. Potrebenikov, A. Sadovskiy, V. Semenov, S. Shkarovskiy, V. Sugonyaev, O. Yushchenko, and A. Zinchenko

Subjects
Fixed Target Experiments, Branching fraction, Rare Decay, Flavour Physics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract Measurement of the ultra-rare K + → π + ν ν ¯ $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ decay at the NA62 experiment at CERN requires high-performance particle identification to distinguish muons from pions. Calorimetric identification currently in use, based on a boosted decision tree algorithm, achieves a muon misidentification probability of 1.2 × 10 −5 for a pion identification efficiency of 75% in the momentum range of 15–40 GeV/c. In this work, calorimetric identification performance is improved by developing an algorithm based on a convolutional neural network classifier augmented by a filter. Muon misidentification probability is reduced by a factor of six with respect to the current value for a fixed pion-identification efficiency of 75%. Alternatively, pion identification efficiency is improved from 72% to 91% for a fixed muon misidentification probability of 10 −5.

Published
2023
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4. A study of the K + → π 0 e + νγ decay

Author

The NA62 collaboration, E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, V. W. S. Wong, D. Bryman, J. Fu, Z. Hives, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, B. De Martino, M. Perrin-Terrin, A. T. Akmete, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, A. Mazzolari, I. Neri, A. Norton, F. Petrucci, M. Soldani, H. Wahl, L. Bandiera, A. Cotta Ramusino, A. Gianoli, M. Romagnoni, A. Sytov, E. Iacopini, G. Latino, M. Lenti, P. Lo Chiatto, I. Panichi, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, G. Tinti, F. Ambrosino, T. Capussela, M. Corvino, M. D’Errico, D. Di Filippo, R. Fiorenza, R. Giordano, P. Massarotti, M. Mirra, M. Napolitano, I. Rosa, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D’Agostini, M. Raggi, A. Biagioni, P. Cretaro, O. Frezza, E. Leonardi, A. Lonardo, M. Turisini, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, A. Briano Olvera, J. Engelfried, N. Estrada-Tristan, M. A. Reyes Santos, P. Boboc, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, M. Ceoletta, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E. B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M. B. Brunetti, V. Duk, V. Fascianelli, J. R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Kenworthy, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, J. Sanders, A. Sergi, A. Sturgess, J. Swallow, A. Tomczak, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J. B. Dainton, R. W. L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, P. Rubin, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, S. Fedotov, K. Gorshanov, E. Gushchin, V. Kekelidze, D. Kereibay, S. Kholodenko, A. Khotyantsev, A. Korotkova, Y. Kudenko, V. Kurochka, V. Kurshetsov, L. Litov, D. Madigozhin, M. Medvedeva, A. Mefodev, M. Misheva, N. Molokanova, S. Movchan, V. Obraztsov, A. Okhotnikov, A. Ostankov, I. Polenkevich, Yu. Potrebenikov, A. Sadovskiy, V. Semenov, S. Shkarovskiy, V. Sugonyaev, O. Yushchenko, and A. Zinchenko

Subjects
Branching fraction, Electroweak Interaction, Fixed Target Experiments, Flavour Physics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract A sample of 1.3 × 105 K + → π 0 e + νγ candidates with less than 1% background was collected by the NA62 experiment at the CERN SPS in 2017–2018. Branching fraction measurements are obtained at percent relative precision in three restricted kinematic regions, improving on existing results by a factor larger than two. An asymmetry, possibly related to T-violation, is investigated with no evidence observed within the achieved precision.

Published
2023
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5. Search for dark photon decays to μ + μ − at NA62

Author

The NA62 collaboration, E. Cortina Gil, J. Jerhot, A. Kleimenova, N. Lurkin, M. Zamkovsky, T. Numao, B. Velghe, V. W. S. Wong, D. Bryman, Z. Hives, T. Husek, K. Kampf, M. Koval, B. De Martino, M. Perrin-Terrin, A. T. Akmete, R. Aliberti, L. Di Lella, N. Doble, L. Peruzzo, S. Schuchmann, H. Wahl, R. Wanke, P. Dalpiaz, A. Mazzolari, I. Neri, F. Petrucci, M. Soldani, L. Bandiera, A. Cotta Ramusino, A. Gianoli, M. Romagnoni, A. Sytov, M. Lenti, P. Lo Chiatto, R. Marchevski, I. Panichi, G. Ruggiero, A. Bizzeti, F. Bucci, A. Antonelli, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, G. Tinti, F. Ambrosino, M. D’Errico, R. Fiorenza, R. Giordano, P. Massarotti, M. Mirra, M. Napolitano, I. Rosa, G. Saracino, G. Anzivino, F. Brizioli, P. Cenci, V. Duk, R. Lollini, P. Lubrano, M. Pepe, M. Piccini, F. Costantini, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, J. Pinzino, M. Sozzi, R. Fantechi, F. Spinella, I. Mannelli, M. Raggi, A. Biagioni, P. Cretaro, O. Frezza, A. Lonardo, M. Turisini, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, E. Menichetti, E. Migliore, C. Biino, A. Filippi, F. Marchetto, D. Soldi, A. Briano Olvera, J. Engelfried, N. Estrada-Tristan, R. Piandani, M. A. Reyes Santos, P. Boboc, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, T. Blazek, V. Cerny, Z. Kucerova, R. Volpe, J. Bernhard, L. Bician, M. Boretto, A. Ceccucci, M. Ceoletta, M. Corvino, H. Danielsson, F. Duval, B. Döbrich, L. Federici, E. Gamberini, R. Guida, E. B. Holzer, B. Jenninger, G. Lehmann Miotto, P. Lichard, K. Massri, E. Minucci, M. Noy, V. Ryjov, J. Swallow, J. R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, C. Kenworthy, C. Lazzeroni, C. Parkinson, A. Romano, J. Sanders, A. Sergi, A. Shaikhiev, A. Tomczak, H. Heath, D. Britton, A. Norton, D. Protopopescu, J. B. Dainton, L. Gatignon, R. W. L. Jones, P. Cooper, D. Coward, P. Rubin, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, S. Fedotov, K. Gorshanov, E. Gushchin, V. Kekelidze, D. Kereibay, S. Kholodenko, A. Khotyantsev, A. Korotkova, Y. Kudenko, V. Kurochka, V. Kurshetsov, L. Litov, D. Madigozhin, A. Mefodev, M. Misheva, N. Molokanova, V. Obraztsov, A. Okhotnikov, I. Polenkevich, Yu. Potrebenikov, A. Sadovskiy, S. Shkarovskiy, V. Sugonyaev, and O. Yushchenko

Subjects
Beyond Standard Model, Exotics, Fixed Target Experiments, Dark Matter, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The NA62 experiment at CERN, designed to study the ultra-rare decay K + → π + ν ν ¯ $$ \nu \overline{\nu} $$ , has also collected data in beam-dump mode. In this configuration, dark photons may be produced by protons dumped on an absorber and reach a decay volume beginning 80 m downstream. A search for dark photons decaying in flight to μ + μ − pairs is reported, based on a sample of 1.4 × 1017 protons on dump collected in 2021. No evidence for a dark photon signal is observed. A region of the parameter space is excluded at 90% CL, improving on previous experimental limits for dark photon masses between 215 and 550 MeV/c 2.

Published
2023
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6. Production of π + and K+ mesons in argon-nucleus interactions at 3.2 A GeV

Author

S. Afanasiev, G. Agakishiev, E. Aleksandrov, I. Aleksandrov, P. Alekseev, K. Alishina, E. Atkin, T. Aushev, V. Babkin, N. Balashov, A. Baranov, D. Baranov, N. Baranova, N. Barbashina, M. Baznat, S. Bazylev, M. Belov, D. Blau, G. Bogdanova, D. Bogoslovsky, A. Bolozdynya, E. Boos, M. Buryakov, S. Buzin, A. Chebotov, J. Chen, D. Dementev, A. Dmitriev, D. Dryablov, A. Dryuk, P. Dulov, D. Egorov, V. Elsha, A. Fediunin, I. Filippov, I. Filozova, D. Finogeev, I. Gabdrakhmanov, A. Galavanov, O. Gavrischuk, K. Gertsenberger, V. Golovatyuk, M. Golubeva, F. Guber, A. Iusupova, A. Ivashkin, A. Izvestnyy, V. Kabadzhov, M. Kapishin, I. Kapitonov, V. Karjavin, D. Karmanov, N. Karpushkin, R. Kattabekov, V. Kekelidze, S. Khabarov, P. Kharlamov, A. Khukhaeva, A. Khvorostukhin, Y. Kiryushin, P. Klimai, D. Klimansky, V. Kolesnikov, A. Kolozhvari, Y. Kopylov, M. Korolev, L. Kovachev, I. Kovalev, Y. Kovalev, I. Kozlov, V. Kozlov, I. Kudryashov, S. Kuklin, E. Kulish, A. Kurganov, A. Kuznetsov, E. Ladygin, D. Lanskoy, N. Lashmanov, V. Lenivenko, R. Lednický, V. Leontiev, E. Litvinenko, Y.-G. Ma, A. Makankin, A. Makhnev, A. Malakhov, A. Martemianov, E. Martovitsky, K. Mashitsin, M. Merkin, S. Merts, A. Morozov, S. Morozov, Y. Murin, G. Musulmanbekov, A. Myasnikov, R. Nagdasev, E. Nekrasowa, S. Nemnyugin, D. Nikitin, S. Novozhilov, V. Palchik, I. Pelevanyuk, D. Peresunko, O. Petukhov, Y. Petukhov, S. Piyadin, M. Platonova, V. Plotnikov, D. Podgainy, V. Rogov, I. Rufanov, P. Rukoyatkin, M. Rumyantsev, D. Sakulin, S. Sergeev, A. Sheremetev, A. Sheremeteva, A. Shchipunov, M. Shitenkov, M. Shopova, V. Shumikhin, A. Shutov, V. Shutov, I. Slepnev, V. Slepnev, I. Slepov, A. Solomin, A. Sorin, V. Sosnovtsev, V. Spaskov, A. Stavinskiy, Yu. Stepanenko, E. Streletskaya, O. Streltsova, M. Strikhanov, N. Sukhov, D. Suvarieva, G. Taer, N. Tarasov, O. Tarasov, P. Teremkov, A. Terletsky, O. Teryaev, V. Tcholakov, V. Tikhomirov, A. Timoshenko, N. Topilin, T. Tretyakova, V. Tskhay, E. Tsvetkov, I. Tyapkin, V. Vasendina, V. Velichkov, V. Volkov, A. Voronin, N. Voytishin, V. Yurevich, I. Yumatova, N. Zamiatin, M. Zavertyaev, S. Zhang, E. Zherebtsova, V. Zhezher, N. Zhigareva, A. Zinchenko, A. Zubankov, E. Zubarev, and M. Zuev

Subjects
Fixed Target Experiments, Heavy-Ion Collision, Minimum Bias, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract First physics results of the BM@N experiment at the Nuclotron/NICA complex are presented on π + and K + meson production in interactions of an argon beam with fixed targets of C, Al, Cu, Sn and Pb at 3.2 A GeV. Transverse momentum distributions, rapidity spectra and multiplicities of π + and K + mesons are measured. The results are compared with predictions of theoretical models and with other measurements at lower energies.

Published
2023
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7. Addendum to: A measurement of the K + → π + μ + μ − decay

Author

The NA62 collaboration, E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, V. W. S. Wong, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, G. Tinti, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, R. Fiorenza, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D’Agostini, M. Raggi, A. Biagioni, P. Cretaro, O. Frezza, E. Leonardi, A. Lonardo, M. Turisini, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E. B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M. B. Brunetti, V. Duk, V. Fascianelli, J. R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, A. Tomczak, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J. B. Dainton, R. W. L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Published
2023
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8. Performance of the NA62 trigger system

Author

The NA62 collaboration, E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, V. W. S. Wong, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, G. Tinti, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, R. Fiorenza, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D’Agostini, M. Raggi, A. Biagioni, P. Cretaro, O. Frezza, E. Leonardi, A. Lonardo, M. Turisini, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E. B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M. B. Brunetti, V. Duk, V. Fascianelli, J. R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, A. Tomczak, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J. B. Dainton, R. W. L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Fixed Target Experiments, Flavour Physics, Flavour Changing Neutral Currents, Rare Decay, Trigger, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The NA62 experiment at CERN targets the measurement of the ultra-rare K + → π + ν ν ¯ $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ decay, and carries out a broad physics programme that includes probes for symmetry violations and searches for exotic particles. Data were collected in 2016–2018 using a multi-level trigger system, which is described highlighting performance studies based on 2018 data.

Published
2023
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9. Search for K+ decays into the π+e+e−e+e− final state

Author

E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, V.W.S. Wong, D. Bryman, J. Fu, Z. Hives, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, B. De Martino, M. Perrin-Terrin, A.T. Akmete, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, A. Mazzolari, I. Neri, A. Norton, F. Petrucci, M. Soldani, H. Wahl, L. Bandiera, A. Cotta Ramusino, A. Gianoli, M. Romagnoni, A. Sytov, E. Iacopini, G. Latino, M. Lenti, P. Lo Chiatto, I. Panichi, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, G. Tinti, F. Ambrosino, T. Capussela, M. Corvino, M. D'Errico, D. Di Filippo, R. Fiorenza, R. Giordano, P. Massarotti, M. Mirra, M. Napolitano, I. Rosa, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D'Agostini, M. Raggi, A. Biagioni, P. Cretaro, O. Frezza, E. Leonardi, A. Lonardo, M. Turisini, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, A. Briano Olvera, J. Engelfried, N. Estrada-Tristan, M.A. Reyes Santos, P. Boboc, A.M. Bragadireanu, S.A. Ghinescu, O.E. Hutanu, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, M. Ceoletta, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E.B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M.B. Brunetti, V. Duk, V. Fascianelli, J.R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Kenworthy, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, J. Sanders, A. Sergi, A. Sturgess, J. Swallow, A. Tomczak, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J.B. Dainton, R.W.L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, P. Rubin, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, S. Fedotov, K. Gorshanov, E. Gushchin, V. Kekelidze, D. Kereibay, S. Kholodenko, A. Khotyantsev, A. Korotkova, Y. Kudenko, V. Kurochka, V. Kurshetsov, L. Litov, D. Madigozhin, M. Medvedeva, A. Mefodev, M. Misheva, N. Molokanova, S. Movchan, V. Obraztsov, A. Okhotnikov, A. Ostankov, I. Polenkevich, Yu. Potrebenikov, A. Sadovskiy, V. Semenov, S. Shkarovskiy, V. Sugonyaev, O. Yushchenko, and A. Zinchenko

Subjects
Physics, QC1-999
Abstract

The first search for ultra-rare K+ decays into the π+e+e−e+e− final state is reported, using a dataset collected by the NA62 experiment at CERN in 2017–2018. An upper limit of 1.4×10−8 at 90% CL is obtained for the branching ratio of the K+→π+e+e−e+e− decay, predicted in the Standard Model to be (7.2±0.7)×10−11. Upper limits at 90% CL are obtained at the level of 10−9 for the branching ratios of two prompt decay chains involving pair-production of hidden-sector mediators: K+→π+aa, a→e+e− and K+→π+S, S→A′A′, A′→e+e−.

Published
2023
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10. A measurement of the K + → π + μ + μ − decay

Author

The NA62 collaboration, E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, V. W. S. Wong, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, G. Tinti, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, R. Fiorenza, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D’Agostini, M. Raggi, A. Biagioni, P. Cretaro, O. Frezza, E. Leonardi, A. Lonardo, M. Turisini, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E. B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M. B. Brunetti, V. Duk, V. Fascianelli, J. R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, A. Tomczak, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J. B. Dainton, R. W. L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Branching fraction, Fixed Target Experiments, Flavour Changing Neutral Currents, Rare Decay, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract A sample of 2.8 × 104 K + → π + μ + μ − candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017–2018. The model-independent branching fraction is measured to be (9.15 ± 0.08) × 10 −8, a factor three more precise than previous measurements. The decay form factor is presented as a function of the squared dimuon mass. A measurement of the form factor parameters and their uncertainties is performed using a description based on Chiral Perturbation Theory at O $$ \mathcal{O} $$ (p 6).

Published
2022
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11. A search for the K+ → μ−νe+e+ decay

Author

E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, V.W.S. Wong, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, G. Tinti, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, R. Fiorenza, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D'Agostini, M. Raggi, A. Biagioni, P. Cretaro, O. Frezza, E. Leonardi, A. Lonardo, M. Turisini, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A.M. Bragadireanu, S.A. Ghinescu, O.E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E.B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M.B. Brunetti, V. Duk, V. Fascianelli, J.R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, A. Tomczak, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J.B. Dainton, R.W.L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Kaon decays, Lepton number violation, Lepton flavour violation, Physics, QC1-999
Abstract

A search for the K+→μ−νe+e+ decay, forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutrino, has been performed using the dataset collected by the NA62 experiment at CERN in 2016–2018. An upper limit of 8.1×10−11 is obtained for the decay branching fraction at 90% CL, improving by a factor of 250 over the previous search.

Published
2023
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12. Measurement of the very rare K + → π + ν ν ¯ $$ {\pi}^{+}\nu \overline{\nu} $$ decay

Author

The NA62 collaboration, E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D’Agostini, M. Raggi, A. Biagioni, E. Leonardi, A. Lonardo, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E. B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M. B. Brunetti, V. Duk, V. Fascianelli, J. R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J. B. Dainton, R. W. L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
FCNC Interaction, Flavour Changing Neutral Currents, Rare decay, Fixed target experiments, Flavor physics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The NA62 experiment reports the branching ratio measurement BR K + → π + ν ν ¯ = 10.6 − 3.4 + 4.0 stat ± 0.9 syst × 10 − 11 $$ \mathrm{BR}\left({K}^{+}\to {\pi}^{+}\nu \overline{\nu}\right)=\left({10.6}_{-3.4}^{+4.0}\left|{}_{\mathrm{stat}}\right.\pm {0.9}_{\mathrm{syst}}\right)\times {10}^{-11} $$ at 68% CL, based on the observation of 20 signal candidates with an expected background of 7.0 events from the total data sample collected at the CERN SPS during 2016–2018. This provides evidence for the very rare K + → π + ν ν ¯ $$ {\pi}^{+}\nu \overline{\nu} $$ decay, observed with a significance of 3.4σ. The experiment achieves a single event sensitivity of (0.839 ± 0.054) × 10 −11, corresponding to 10.0 events assuming the Standard Model branching ratio of (8.4 ± 1.0) × 10 −11. This measurement is also used to set limits on BR(K + → π + X), where X is a scalar or pseudo-scalar particle. Details are given of the analysis of the 2018 data sample, which corresponds to about 80% of the total data sample.

Published
2021
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13. Searches for lepton number violating K+ → π−(π0)e+e+ decays

Author

E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, V.W.S. Wong, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, G. Tinti, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, R. Fiorenza, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D'Agostini, M. Raggi, A. Biagioni, P. Cretaro, O. Frezza, E. Leonardi, A. Lonardo, M. Turisini, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A.M. Bragadireanu, S.A. Ghinescu, O.E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E.B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M.B. Brunetti, V. Duk, V. Fascianelli, J.R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, A. Tomczak, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J.B. Dainton, R.W.L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Physics, QC1-999
Abstract

Searches for lepton number violating K+→π−e+e+ and K+→π−π0e+e+ decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of 5.3×10−11 and 8.5×10−10 are obtained on the decay branching fractions at 90% confidence level. The former result improves by a factor of four over the previous best limit, while the latter result represents the first limit on the K+→π−π0e+e+ decay rate.

Published
2022
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14. Search for a feebly interacting particle X in the decay K + → π + X

Author

The NA62 collaboration, E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, B. Velghe, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, R. Marchevski, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D’Agostini, M. Raggi, A. Biagioni, E. Leonardi, A. Lonardo, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E. B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M. B. Brunetti, V. Duk, V. Fascianelli, J. R. Fry, F. Gonnella, E. Goudzovski, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J. B. Dainton, R. W. L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Beyond Standard Model, Exotics, Fixed target experiments, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract A search for the K + → π + X decay, where X is a long-lived feebly interacting particle, is performed through an interpretation of the K + → π + ν ν ¯ $$ {\pi}^{+}\nu \overline{\nu} $$ analysis of data collected in 2017 by the NA62 experiment at CERN. Two ranges of X masses, 0–110 MeV/c 2 and 154–260 MeV/c 2, and lifetimes above 100 ps are considered. The limits set on the branching ratio, BR(K + → π + X), are competitive with previously reported searches in the first mass range, and improve on current limits in the second mass range by more than an order of magnitude.

Published
2021
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15. An investigation of the very rare K + → π + ν ν ¯ $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ decay

Author

The NA62 collaboration, E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, B. Velghe, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, R. Marchevski, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D’Agostini, M. Raggi, A. Biagioni, E. Leonardi, A. Lonardo, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E. B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M. B. Brunetti, V. Duk, V. Fascianelli, J. R. Fry, F. Gonnella, E. Goudzovski, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J. B. Dainton, R. W. L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Fixed target experiments, Flavor physics, Flavour Changing Neutral Currents, Rare decay, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The NA62 experiment reports an investigation of the K + → π + ν ν ¯ $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ mode from a sample of K + decays collected in 2017 at the CERN SPS. The experiment has achieved a single event sensitivity of (0.389 ± 0.024) × 10 −10, corresponding to 2.2 events assuming the Standard Model branching ratio of (8.4 ± 1.0) × 10 −11. Two signal candidates are observed with an expected background of 1.5 events. Combined with the result of a similar analysis conducted by NA62 on a smaller data set recorded in 2016, the collaboration now reports an upper limit of 1.78 × 10 −10 for the K + → π + ν ν ¯ $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ branching ratio at 90% CL. This, together with the corresponding 68% CL measurement of ( 0.48 − 0.48 + 0.72 $$ {0.48}_{-0.48}^{+0.72} $$ ) × 10 −10, are currently the most precise results worldwide, and are able to constrain some New Physics models that predict large enhancements still allowed by previous measurements.

Published
2020
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16. Search for production of an invisible dark photon in π 0 decays

Author

The NA62 collaboration, E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, G. Georgiev, V. Kozhuharov, L. Litov, T. Numao, Y. Petrov, B. Velghe, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Lanfranchi, G. Mannocchi, S. Martellotti, M. Moulson, T. Spadaro, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D’Agostini, M. Raggi, A. Biagioni, E. Leonardi, A. Lonardo, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E. B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M. B. Brunetti, V. Duk, V. Fascianelli, J. R. Fry, F. Gonnella, E. Goudzovski, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J. B. Dainton, R. W. L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Beyond Standard Model, Exotics, Fixed target experiments, Rare decay, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The results of a search for π 0 decays to a photon and an invisible massive dark photon at the NA62 experiment at the CERN SPS are reported. From a total of 4.12 × 108 tagged π 0 mesons, no signal is observed. Assuming a kinetic-mixing interaction, limits are set on the dark photon coupling to the ordinary photon as a function of the dark photon mass, improving on previous searches in the mass range 60–110 MeV/c 2. The present results are interpreted in terms of an upper limit of the branching ratio of the electro-weak decay π 0 → γ ν ν ¯ $$ {\pi}^0\to \gamma \nu \overline{\nu} $$ , improving the current limit by more than three orders of magnitude.

Published
2019
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17. First search for K+→π+νν¯ using the decay-in-flight technique

Author

E. Cortina Gil, E. Minucci, S. Padolski, P. Petrov, B. Velghe, G. Georgiev, V. Kozhuharov, L. Litov, T. Numao, D. Bryman, J. Fu, T. Husek, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, R. Marchevski, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, E. Gamberini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Bizzeti, F. Bucci, R. Volpe, A. Antonelli, G. Lamanna, G. Lanfranchi, G. Mannocchi, S. Martellotti, M. Moulson, M. Raggi, T. Spadaro, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, V. Duk, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, R. Piandani, J. Pinzino, L. Pontisso, F. Spinella, I. Mannelli, G. D'Agostini, A. Biagioni, E. Leonardi, A. Lonardo, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, L. Federici, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A.M. Bragadireanu, S.A. Ghinescu, O.E. Hutanu, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, A. Kleimenova, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, A. Shaikhiev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, M. Koval, Z. Kucerova, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Gatignon, R. Guida, F. Hahn, B. Jenninger, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, V. Ryjov, S. Venditti, M.B. Brunetti, V. Fascianelli, F. Gonnella, E. Goudzovski, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J.B. Dainton, J.R. Fry, L. Fulton, D. Hutchcroft, E. Maurice, G. Ruggiero, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Physics, QC1-999
Abstract

The NA62 experiment at the CERN SPS reports the first search for K+→π+νν¯ using the decay-in-flight technique, based on a sample of 1.21×1011 K+ decays collected in 2016. The single event sensitivity is 3.15×10−10, corresponding to 0.267 Standard Model events. One signal candidate is observed while the expected background is 0.152 events. This leads to an upper limit of 14×10−10 on the K+→π+νν¯ branching ratio at 95% CL.

Published
2019
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18. First observation and study of the K± → π±π0e+e− decay

Author

J.R. Batley, G. Kalmus, C. Lazzeroni, D.J. Munday, M.W. Slater, S.A. Wotton, R. Arcidiacono, G. Bocquet, N. Cabibbo, A. Ceccucci, D. Cundy, V. Falaleev, M. Fidecaro, L. Gatignon, A. Gonidec, W. Kubischta, A. Maier, A. Norton, M. Patel, A. Peters, S. Balev, P.L. Frabetti, E. Gersabeck, E. Goudzovski, P. Hristov, V. Kekelidze, V. Kozhuharov, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, I. Polenkevich, Yu. Potrebenikov, S. Stoynev, A. Zinchenko, E. Monnier, E. Swallow, R. Winston, P. Rubin, A. Walker, P. Dalpiaz, C. Damiani, M. Fiorini, M. Martini, F. Petrucci, M. Savrié, M. Scarpa, H. Wahl, W. Baldini, A. Cotta Ramusino, A. Gianoli, M. Calvetti, E. Celeghini, E. Iacopini, M. Lenti, G. Ruggiero, A. Bizzeti, M. Veltri, M. Behler, K. Eppard, M. Hita-Hochgesand, K. Kleinknecht, P. Marouelli, L. Masetti, U. Moosbrugger, C. Morales Morales, B. Renk, M. Wache, R. Wanke, A. Winhart, D. Coward, A. Dabrowski, T. Fonseca Martin, M. Shieh, M. Szleper, M. Velasco, M.D. Wood, G. Anzivino, E. Imbergamo, A. Nappi, M. Piccini, M. Raggi, M. Valdata-Nappi, P. Cenci, M. Pepe, M.C. Petrucci, F. Costantini, N. Doble, L. Fiorini, S. Giudici, G. Pierazzini, M. Sozzi, S. Venditti, G. Collazuol, L. DiLella, G. Lamanna, I. Mannelli, A. Michetti, C. Cerri, R. Fantechi, B. Bloch-Devaux, C. Cheshkov, J.B. Chèze, M. De Beer, J. Derré, G. Marel, E. Mazzucato, B. Peyaud, B. Vallage, M. Holder, M. Ziolkowski, S. Bifani, M. Clemencic, S. Goy Lopez, C. Biino, N. Cartiglia, F. Marchetto, H. Dibon, M. Jeitler, M. Markytan, I. Mikulec, G. Neuhofer, and L. Widhalm

Subjects
Physics, QC1-999
Abstract

The NA48/2 experiment at CERN reports the first observation of the K±→π±π0e+e− decay from an exposure of 1.7×1011 charged kaon decays recorded in 2003–2004. A sample of 4919 candidates with 4.9% background contamination allows the determination of the branching ratio in the full kinematic region, BR(K±→π±π0e+e−)=(4.24±0.14)×10−6. The study of the kinematic space shows evidence for a structure dependent contribution in agreement with predictions based on chiral perturbation theory. Several P- and CP-violating asymmetries are also evaluated.

Published
2019
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19. Search for K+ decays to a muon and invisible particles

Author

E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D'Agostini, M. Raggi, A. Biagioni, E. Leonardi, A. Lonardo, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A.M. Bragadireanu, S.A. Ghinescu, O.E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E.B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M.B. Brunetti, V. Duk, V. Fascianelli, J.R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J.B. Dainton, R.W.L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Physics, QC1-999
Abstract

The NA62 experiment at CERN reports searches for K+→μ+N and K+→μ+νX decays, where N and X are massive invisible particles, using the 2016–2018 data set. The N particle is assumed to be a heavy neutral lepton, and the results are expressed as upper limits of O(10−8) of the neutrino mixing parameter |Uμ4|2 for N masses in the range 200–384 MeV/c2 and lifetime exceeding 50 ns. The X particle is considered a scalar or vector hidden sector mediator decaying to an invisible final state, and upper limits of the decay branching fraction for X masses in the range 10–370 MeV/c2 are reported for the first time, ranging from O(10−5) to O(10−7). An improved upper limit of 1.0×10−6 is established at 90% CL on the K+→μ+ννν¯ branching fraction.

Published
2021
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20. Search for heavy neutral lepton production in K+ decays to positrons

Author

E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D'Agostini, M. Raggi, A. Biagioni, E. Leonardi, A. Lonardo, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A.M. Bragadireanu, S.A. Ghinescu, O.E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E.B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M.B. Brunetti, V. Duk, V. Fascianelli, J.R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J.B. Dainton, R.W.L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Physics, QC1-999
Abstract

A search for heavy neutral lepton (N) production in K+→e+N decays using the data sample collected by the NA62 experiment at CERN in 2017–2018 is reported. Upper limits of the extended neutrino mixing matrix element |Ue4|2 are established at the level of 10−9 over most of the accessible heavy neutral lepton mass range 144–462 MeV/c2, with the assumption that the lifetime exceeds 50 ns. These limits improve significantly upon those of previous production and decay searches. The |Ue4|2 range favoured by Big Bang Nucleosynthesis is excluded up to a mass of about 340 MeV/c2.

Published
2020
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21. Measurement of the form factors of charged kaon semileptonic decays

Author

The NA48/2 collaboration, J. R. Batley, G. Kalmus, C. Lazzeroni, D. J. Munday, M. W. Slater, S. A. Wotton, R. Arcidiacono, G. Bocquet, N. Cabibbo, A. Ceccucci, D. Cundy, V. Falaleev, M. Fidecaro, L. Gatignon, A. Gonidec, W. Kubischta, A. Maier, A. Norton, M. Patel, A. Peters, S. Balev, P. L. Frabetti, E. Gersabeck, E. Goudzovski, P. Hristov, V. Kekelidze, V. Kozhuharov, L. Litov, D. Madigozhin, N. Molokanova, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, S. Stoynev, A. Zinchenko, E. Monnier, E. Swallow, R. Winston, P. Rubin, A. Walker, P. Dalpiaz, C. Damiani, M. Fiorini, M. Martini, F. Petrucci, M. Savrié, M. Scarpa, H. Wahl, W. Baldini, A. Cotta Ramusino, A. Gianoli, M. Calvetti, E. Celeghini, E. Iacopini, M. Lenti, G. Ruggiero, A. Bizzeti, M. Veltri, M. Behler, K. Eppard, M. Hita-Hochgesand, K. Kleinknecht, P. Marouelli, L. Masetti, U. Moosbrugger, C. Morales Morales, B. Renk, M. Wache, R. Wanke, A. Winhart, D. Coward, A. Dabrowski, T. Fonseca Martin, M. Shieh, M. Szleper, M. Velasco, M. D. Wood, G. Anzivino, E. Imbergamo, A. Nappi, M. Piccini, M. Raggi, M. Valdata-Nappi, P. Cenci, M. Pepe, M. C. Petrucci, F. Costantini, N. Doble, L. Fiorini, S. Giudici, G. Pierazzini, M. Sozzi, S. Venditti, G. Collazuol, L. DiLella, G. Lamanna, I. Mannelli, A. Michetti, C. Cerri, R. Fantechi, B. Bloch-Devaux, C. Cheshkov, J. B. Chèze, M. De Beer, J. Derré, G. Marel, E. Mazzucato, B. Peyaud, B. Vallage, M. Holder, M. Ziolkowski, S. Bifani, M. Clemencic, S. Goy Lopez, C. Biino, N. Cartiglia, F. Marchetto, H. Dibon, M. Jeitler, M. Markytan, I. Mikulec, G. Neuhofer, and L. Widhalm

Subjects
Fixed target experiments, Rare decay, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract A measurement of the form factors of charged kaon semileptonic decays is presented, based on 4.4 × 106 K ± → π 0 e ± ν e (K e3 ± ) and 2.3 × 106 K ± → π 0 μ±ν μ (K μ3 ± ) decays collected in 2004 by the NA48/2 experiment. The results are obtained with improved precision as compared to earlier measurements. The combination of measurements in the K e3 ± and K μ3 ± modes is also presented.

Published
2018
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22. Searches for lepton number violating K+ decays

Author

E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, G. Mannocchi, S. Martellotti, M. Moulson, T. Spadaro, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D'Agostini, M. Raggi, A. Biagioni, E. Leonardi, A. Lonardo, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A.M. Bragadireanu, S.A. Ghinescu, O.E. Hutanu, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. Döbrich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E.B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M.B. Brunetti, V. Duk, V. Fascianelli, J.R. Fry, F. Gonnella, E. Goudzovski, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J.B. Dainton, R.W.L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, and P. Rubin

Subjects
Physics, QC1-999
Abstract

The NA62 experiment at CERN reports a search for the lepton number violating decays K+→π−e+e+ and K+→π−μ+μ+ using a data sample collected in 2017. No signals are observed, and upper limits on the branching fractions of these decays of 2.2×10−10 and 4.2×10−11 are obtained, respectively, at 90% confidence level. These upper limits improve on previously reported measurements by factors of 3 and 2, respectively.

Published
2019
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23. A search for the K+ -> mu- nu e+ e+ decay

Author

E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, V. W. S. Wong, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, G. Tinti, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, R. Fiorenza, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D'Agostini, M. Raggi, A. Biagioni, P. Cretaro, O. Frezza, E. Leonardi, A. Lonardo, M. Turisini, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. D??brich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E. B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M. B. Brunetti, V. Duk, V. Fascianelli, J. R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, A. Tomczak, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J. B. Dainton, R. W. L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, P. Rubin, Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Numao, T., Petrov, Y., Velghe, B., Wong, V. W. S., Bryman, D., Fu, J., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., Aliberti, R., Khoriauli, G., Kunze, J., Lomidze, D., Peruzzo, L., Vormstein, M., Wanke, R., Dalpiaz, P., Fiorini, M., Neri, I., Norton, A., Petrucci, F., Wahl, H., Cotta Ramusino, A., Gianoli, A., Iacopini, E., Latino, G., Lenti, M., Parenti, A., Bizzeti, A., Bucci, F., Antonelli, A., Georgiev, G., Kozhuharov, V., Lanfranchi, G., Martellotti, S., Moulson, M., Spadaro, T., Tinti, G., Ambrosino, F., Capussela, T., Corvino, M., Di Filippo, D., Fiorenza, R., Massarotti, P., Mirra, M., Napolitano, M., Saracino, G., Anzivino, G., Brizioli, F., Imbergamo, E., Lollini, R., Piandani, R., Santoni, C., Barbanera, M., Cenci, P., Checcucci, B., Lubrano, P., Lupi, M., Pepe, M., Piccini, M., Costantini, F., Di Lella, L., Doble, N., Giorgi, M., Giudici, S., Lamanna, G., Lari, E., Pedreschi, E., Sozzi, M., Cerri, C., Fantechi, R., Pontisso, L., Spinella, F., Mannelli, I., D'Agostini, G., Raggi, M., Biagioni, A., Cretaro, P., Frezza, O., Leonardi, E., Lonardo, A., Turisini, M., Valente, P., Vicini, P., Ammendola, R., Bonaiuto, V., Fucci, A., Salamon, A., Sargeni, F., Arcidiacono, R., Bloch-Devaux, B., Boretto, M., Menichetti, E., Migliore, E., Soldi, D., Biino, C., Filippi, A., Marchetto, F., Engelfried, J., Estrada-Tristan, N., Bragadireanu, A. M., Ghinescu, S. A., Hutanu, O. E., Baeva, A., Baigarashev, D., Emelyanov, D., Enik, T., Falaleev, V., Kekelidze, V., Korotkova, A., Litov, L., Madigozhin, D., Misheva, M., Molokanova, N., Movchan, S., Polenkevich, I., Potrebenikov, Yu., Shkarovskiy, S., Zinchenko, A., Fedotov, S., Gushchin, E., Khotyantsev, A., Kudenko, Y., Kurochka, V., Medvedeva, M., Mefodev, A., Kholodenko, S., Kurshetsov, V., Obraztsov, V., Ostankov, A., Semenov, V., Sugonyaev, V., Yushchenko, O., Bician, L., Blazek, T., Cerny, V., Kucerova, Z., Bernhard, J., Ceccucci, A., Danielsson, H., De Simone, N., Duval, F., D??brich, B., Federici, L., Gamberini, E., Gatignon, L., Guida, R., Hahn, F., Holzer, E. B., Jenninger, B., Koval, M., Laycock, P., Lehmann Miotto, G., Lichard, P., Mapelli, A., Marchevski, R., Massri, K., Noy, M., Palladino, V., Perrin-Terrin, M., Pinzino, J., Ryjov, V., Schuchmann, S., Venditti, S., Bache, T., Brunetti, M. B., Duk, V., Fascianelli, V., Fry, J. R., Gonnella, F., Goudzovski, E., Henshaw, J., Iacobuzio, L., Lazzeroni, C., Lurkin, N., Newson, F., Parkinson, C., Romano, A., Sergi, A., Sturgess, A., Swallow, J., Tomczak, A., Heath, H., Page, R., Trilov, S., Angelucci, B., Britton, D., Graham, C., Protopopescu, D., Carmignani, J., Dainton, J. B., Jones, R. W. L., Ruggiero, G., Fulton, L., Hutchcroft, D., Maurice, E., Wrona, B., Conovaloff, A., Cooper, P., Coward, D., and Rubin, P.

Published
2023

24. Search for the dark photon in π0 decays

Author

J.R. Batley, G. Kalmus, C. Lazzeroni, D.J. Munday, M.W. Slater, S.A. Wotton, R. Arcidiacono, G. Bocquet, N. Cabibbo, A. Ceccucci, D. Cundy, V. Falaleev, M. Fidecaro, L. Gatignon, A. Gonidec, W. Kubischta, A. Norton, A. Maier, M. Patel, A. Peters, S. Balev, P.L. Frabetti, E. Gersabeck, E. Goudzovski, P. Hristov, V. Kekelidze, V. Kozhuharov, L. Litov, D. Madigozhin, N. Molokanova, I. Polenkevich, Yu. Potrebenikov, S. Stoynev, A. Zinchenko, E. Monnier, E. Swallow, R. Winston, P. Rubin, A. Walker, W. Baldini, A. Cotta Ramusino, P. Dalpiaz, C. Damiani, M. Fiorini, A. Gianoli, M. Martini, F. Petrucci, M. Savrié, M. Scarpa, H. Wahl, A. Bizzeti, M. Lenti, M. Veltri, M. Calvetti, E. Celeghini, E. Iacopini, G. Ruggiero, M. Behler, K. Eppard, K. Kleinknecht, P. Marouelli, L. Masetti, U. Moosbrugger, C. Morales Morales, B. Renk, M. Wache, R. Wanke, A. Winhart, D. Coward, A. Dabrowski, T. Fonseca Martin, M. Shieh, M. Szleper, M. Velasco, M.D. Wood, P. Cenci, M. Pepe, M.C. Petrucci, G. Anzivino, E. Imbergamo, A. Nappi, M. Piccini, M. Raggi, M. Valdata-Nappi, C. Cerri, R. Fantechi, G. Collazuol, L. DiLella, G. Lamanna, I. Mannelli, A. Michetti, F. Costantini, N. Doble, L. Fiorini, S. Giudici, G. Pierazzini, M. Sozzi, S. Venditti, B. Bloch-Devaux, C. Cheshkov, J.B. Chèze, M. De Beer, J. Derré, G. Marel, E. Mazzucato, B. Peyaud, B. Vallage, M. Holder, M. Ziolkowski, C. Biino, N. Cartiglia, F. Marchetto, S. Bifani, M. Clemencic, S. Goy Lopez, H. Dibon, M. Jeitler, M. Markytan, I. Mikulec, G. Neuhofer, and L. Widhalm

Subjects
Physics, QC1-999
Abstract

A sample of 1.69×107 fully reconstructed π0→γe+e− decay candidates collected by the NA48/2 experiment at CERN in 2003–2004 is analyzed to search for the dark photon (A′) production in the π0→γA′ decay followed by the prompt A′→e+e− decay. No signal is observed, and an exclusion region in the plane of the dark photon mass mA′ and mixing parameter ε2 is established. The obtained upper limits on ε2 are more stringent than the previous limits in the mass range 9 MeV/c2

Published
2015
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25. Measurement of the very rare K+→π+νν ̄decay at the NA62 experiment at CERN

Author

Renato Fiorenza, A. Akmete, R. Aliberti, F. Ambrosino, R. Ammendola, B. Angelucci, A. Antonelli, G. Anzivino, R. Arcidiacono, T. Bache, A. Baeva, D. Baigarashev, L. Bandiera, M. Barbanera, J. Bernhard, A. Biagioni, L. Bician, C. Biino, A. Bizzeti, T. Blazek, B. Bloch-Devaux, P. Boboc, V. Bonaiuto, M. Boretto, M. Bragadireanu, A. Briano Olvera, D. Britton, F. Brizioli, M.B. Brunetti, D. Bryman, F. Bucci, T. Capussela, J. Carmignani, A. Ceccucci, P. Cenci, V. Cerny, C. Cerri, B. Checcucci, A. Conovaloff, P. Cooper, E. Cortina Gil, M. Corvino, F. Costantini, A. Cotta Ramusino, D. Coward, P. Cretaro, G. D’Agostini, J. Dainton, P. Dalpiaz, H. Danielsson, M. D’Errico, N. De Simone, D. Di Filippo, L. Di Lella, N. Doble, B. Dobrich, F. Duval, V. Duk, D. Emelyanov, J. Engelfried, T. Enik, N. Estrada-Tristan, V. Falaleev, R. Fantechi, V. Fascianelli, L. Federici, S. Fedotov, A. Filippi, R. Fiorenza, M. Fiorini, O. Frezza, J. Fry, J. Fu, A. Fucci, L. Fulton, E. Gamberini, L. Gatignon, G. Georgiev, S. Ghinescu, A. Gianoli, M. Giorgi, S. Giudici, F. Gonnella, K. Gorshanov, E. Goudzovski, C. Graham, R. Guida, Evgeny Gushchin, F. Hahn, H. Heath, J. Henshaw, Z. Hives, E.B. Holzer, Tomas Husek, O. Hutanu, D. Hutchcroft, L. Iacobuzio, E. Iacopini, E. Imbergamo, B. Jenninger, J. Jerhot, R.W. Jones, K. Kampf, V. Kekelidze, D. Kerebay, S. Kholodenko, G. Khoriauli, A. Kleimenova, A. Korotkova, A. Khotyantsev, M. Koval, V. Kozhuharov, Z. Kucerova, Y. G. Kudenko, J. Kunze, V. Kurochka, V. Kurshetsov, G. Lanfranchi, G. Lamanna, E. Lari, G. Latino, P. Laycock, C. Lazzeroni, M. Lenti, G. Lehmann Miotto, E. Leonardi, P. Lichard, L. Litov, P. Lo Chiatto, R. Lollini, D. Lomidze, A. Lonardo, P. Lubrano, M. Lupi, N. Lurkin, D. Madigozhin, I. Mannelli, A. Mapelli, F. Marchetto, R. Marchevski, S. Martellotti, P. Massarotti, K. Massri, E. Maurice, A. Mazzolari, M. Medvedeva, A. Mefodev, E. Menichetti, E. Migliore, E. Minucci, M. Mirra, M. Misheva, N. Molokanova, M. Moulson, S. Movchan, M. Napolitano, I. Neri, F. Newson, A. Norton, M. Noy, T. Numao, V. Obraztsov, A. Okhotnikov, A. Ostankov, S. Padolski, R. D. page, V. Palladino, I. Panichi, A. Parenti, C. Parkinson, E. Pedreschi, M. Pepe, M. Perrin-Terrin, L. Peruzzo, P. Petrov, Y. Petrov, F. Petrucci, R. Piandani, M. Piccini, J. Pinzino, I. Polenkevich, L. Pontisso, Yu. Potrebenikov, D. Protopopescu, M. Raggi, Marco Antonio Reyes Santos, M. Romagnoni, A. Romano, P. Rubin, G. Ruggiero, V. Ryjov, A. Sadovsky, A. Salamon, C. Santoni, G. Saracino, F. Sargeni, S. Schuchmann, V. Semenov, A. Sergi, A. Shaikhiev, S. Shkarovskiy, M. Soldani, D. Soldi, M. Sozzi, T. Spadaro, F. Spinella, A. Sturgess, V. Sugonyaev, J. Swallow, A. Sytov, G. Tinti, A. Tomczak, S. Trilov, M. Turisini, P. Valente, B. Velghe, S. Venditti, P. Vicini, R. Volpe, M. Vormstein, H. Wahl, R. Wanke, V. Wong, B. Wrona, O. Yushchenko, M. Zamkovsky, and A. Zinchenko

Subjects
Settore FIS/04
Published
2022

26. Measurement of the very rare K+ -> pi+ nu nu bar decay

Author

E. Cortina Gil, A. Kleimenova, E. Minucci, S. Padolski, P. Petrov, A. Shaikhiev, R. Volpe, T. Numao, Y. Petrov, B. Velghe, D. Bryman, J. Fu, T. Husek, J. Jerhot, K. Kampf, M. Zamkovsky, R. Aliberti, G. Khoriauli, J. Kunze, D. Lomidze, L. Peruzzo, M. Vormstein, R. Wanke, P. Dalpiaz, M. Fiorini, I. Neri, A. Norton, F. Petrucci, H. Wahl, A. Cotta Ramusino, A. Gianoli, E. Iacopini, G. Latino, M. Lenti, A. Parenti, A. Bizzeti, F. Bucci, A. Antonelli, G. Georgiev, V. Kozhuharov, G. Lanfranchi, S. Martellotti, M. Moulson, T. Spadaro, F. Ambrosino, T. Capussela, M. Corvino, D. Di Filippo, P. Massarotti, M. Mirra, M. Napolitano, G. Saracino, G. Anzivino, F. Brizioli, E. Imbergamo, R. Lollini, R. Piandani, C. Santoni, M. Barbanera, P. Cenci, B. Checcucci, P. Lubrano, M. Lupi, M. Pepe, M. Piccini, F. Costantini, L. Di Lella, N. Doble, M. Giorgi, S. Giudici, G. Lamanna, E. Lari, E. Pedreschi, M. Sozzi, C. Cerri, R. Fantechi, L. Pontisso, F. Spinella, I. Mannelli, G. D???Agostini, M. Raggi, A. Biagioni, E. Leonardi, A. Lonardo, P. Valente, P. Vicini, R. Ammendola, V. Bonaiuto, A. Fucci, A. Salamon, F. Sargeni, R. Arcidiacono, B. Bloch-Devaux, M. Boretto, E. Menichetti, E. Migliore, D. Soldi, C. Biino, A. Filippi, F. Marchetto, J. Engelfried, N. Estrada-Tristan, A. M. Bragadireanu, S. A. Ghinescu, O. E. Hutanu, A. Baeva, D. Baigarashev, D. Emelyanov, T. Enik, V. Falaleev, V. Kekelidze, A. Korotkova, L. Litov, D. Madigozhin, M. Misheva, N. Molokanova, S. Movchan, I. Polenkevich, Yu. Potrebenikov, S. Shkarovskiy, A. Zinchenko, S. Fedotov, E. Gushchin, A. Khotyantsev, Y. Kudenko, V. Kurochka, M. Medvedeva, A. Mefodev, S. Kholodenko, V. Kurshetsov, V. Obraztsov, A. Ostankov, V. Semenov, V. Sugonyaev, O. Yushchenko, L. Bician, T. Blazek, V. Cerny, Z. Kucerova, J. Bernhard, A. Ceccucci, H. Danielsson, N. De Simone, F. Duval, B. D??brich, L. Federici, E. Gamberini, L. Gatignon, R. Guida, F. Hahn, E. B. Holzer, B. Jenninger, M. Koval, P. Laycock, G. Lehmann Miotto, P. Lichard, A. Mapelli, R. Marchevski, K. Massri, M. Noy, V. Palladino, M. Perrin-Terrin, J. Pinzino, V. Ryjov, S. Schuchmann, S. Venditti, T. Bache, M. B. Brunetti, V. Duk, V. Fascianelli, J. R. Fry, F. Gonnella, E. Goudzovski, J. Henshaw, L. Iacobuzio, C. Lazzeroni, N. Lurkin, F. Newson, C. Parkinson, A. Romano, A. Sergi, A. Sturgess, J. Swallow, H. Heath, R. Page, S. Trilov, B. Angelucci, D. Britton, C. Graham, D. Protopopescu, J. Carmignani, J. B. Dainton, R. W. L. Jones, G. Ruggiero, L. Fulton, D. Hutchcroft, E. Maurice, B. Wrona, A. Conovaloff, P. Cooper, D. Coward, P. Rubin, Cortina Gil, E., Kleimenova, A., Minucci, E., Padolski, S., Petrov, P., Shaikhiev, A., Volpe, R., Numao, T., Petrov, Y., Velghe, B., Bryman, D., Fu, J., Husek, T., Jerhot, J., Kampf, K., Zamkovsky, M., Aliberti, R., Khoriauli, G., Kunze, J., Lomidze, D., Peruzzo, L., Vormstein, M., Wanke, R., Dalpiaz, P., Fiorini, M., Neri, I., Norton, A., Petrucci, F., Wahl, H., Cotta Ramusino, A., Gianoli, A., Iacopini, E., Latino, G., Lenti, M., Parenti, A., Bizzeti, A., Bucci, F., Antonelli, A., Georgiev, G., Kozhuharov, V., Lanfranchi, G., Martellotti, S., Moulson, M., Spadaro, T., Ambrosino, F., Capussela, T., Corvino, M., Di Filippo, D., Massarotti, P., Mirra, M., Napolitano, M., Saracino, G., Anzivino, G., Brizioli, F., Imbergamo, E., Lollini, R., Piandani, R., Santoni, C., Barbanera, M., Cenci, P., Checcucci, B., Lubrano, P., Lupi, M., Pepe, M., Piccini, M., Costantini, F., Di Lella, L., Doble, N., Giorgi, M., Giudici, S., Lamanna, G., Lari, E., Pedreschi, E., Sozzi, M., Cerri, C., Fantechi, R., Pontisso, L., Spinella, F., Mannelli, I., D???agostini, G., Raggi, M., Biagioni, A., Leonardi, E., Lonardo, A., Valente, P., Vicini, P., Ammendola, R., Bonaiuto, V., Fucci, A., Salamon, A., Sargeni, F., Arcidiacono, R., Bloch-Devaux, B., Boretto, M., Menichetti, E., Migliore, E., Soldi, D., Biino, C., Filippi, A., Marchetto, F., Engelfried, J., Estrada-Tristan, N., Bragadireanu, A. M., Ghinescu, S. A., Hutanu, O. E., Baeva, A., Baigarashev, D., Emelyanov, D., Enik, T., Falaleev, V., Kekelidze, V., Korotkova, A., Litov, L., Madigozhin, D., Misheva, M., Molokanova, N., Movchan, S., Polenkevich, I., Potrebenikov, Yu., Shkarovskiy, S., Zinchenko, A., Fedotov, S., Gushchin, E., Khotyantsev, A., Kudenko, Y., Kurochka, V., Medvedeva, M., Mefodev, A., Kholodenko, S., Kurshetsov, V., Obraztsov, V., Ostankov, A., Semenov, V., Sugonyaev, V., Yushchenko, O., Bician, L., Blazek, T., Cerny, V., Kucerova, Z., Bernhard, J., Ceccucci, A., Danielsson, H., De Simone, N., Duval, F., D??brich, B., Federici, L., Gamberini, E., Gatignon, L., Guida, R., Hahn, F., Holzer, E. B., Jenninger, B., Koval, M., Laycock, P., Lehmann Miotto, G., Lichard, P., Mapelli, A., Marchevski, R., Massri, K., Noy, M., Palladino, V., Perrin-Terrin, M., Pinzino, J., Ryjov, V., Schuchmann, S., Venditti, S., Bache, T., Brunetti, M. B., Duk, V., Fascianelli, V., Fry, J. R., Gonnella, F., Goudzovski, E., Henshaw, J., Iacobuzio, L., Lazzeroni, C., Lurkin, N., Newson, F., Parkinson, C., Romano, A., Sergi, A., Sturgess, A., Swallow, J., Heath, H., Page, R., Trilov, S., Angelucci, B., Britton, D., Graham, C., Protopopescu, D., Carmignani, J., Dainton, J. B., Jones, R. W. L., Ruggiero, G., Fulton, L., Hutchcroft, D., Maurice, E., Wrona, B., Conovaloff, A., Cooper, P., Coward, D., and Rubin, P.

Published
2021

27. Unperturbed inverse kinematics nucleon knockout measurements with a carbon beam

Author

S. Morozov, T. Atovullaev, O. Gavrischuk, I. Rufanov, D. M. Rossi, I. Slepnev, V. Tcholakov, V. Zhezher, Yu. Potrebenikov, E.P. Segarra, A. Timoshenko, A. Taranenko, A. Corsi, A. Shutov, D. Blaschke, A. Terletsky, G. Musulmanbekov, A. Kuznetsov, A. Vishnevsky, Herbert A. Simon, V. Vasendina, E. Piasetzky, V. Lenivenko, R. Kattabekov, D. Sakulin, A. Dmitriev, S. Lobastov, P. Dulov, Yu. Ivanova, O. Warmusz, N. Topilin, V. Rogov, M. Duer, P. Senger, V. Spaskov, D. Suvarieva, A. Morozov, Alexander Schmidt, N. Lashmanov, Kh. U. Abraamyan, I. Slepov, K. Gertsenberger, N. Zamiatin, D. Baranov, M. Strikhanov, V. Yurevich, K. Boretzky, V. Babkin, V. Samsonov, G. Agakishiev, N. Karpushkin, D. Bogoslovsky, V. Kekelidze, D. Peresunko, Y.-G. Ma, I. Filippov, A. Ciszewski, A. Ivashkin, D. Egorov, B. Topko, A. Zinchenko, M. Patsyuk, V. Shumikhin, V. Plotnikov, O. Petukhov, S. Bazylev, V. Shutov, Carlos A. Bertulani, M. Buryakov, A. Fediunin, V. Tikhomirov, E. Litvinenko, A. Makankin, I. Korover, D. Blau, S. Khabarov, Yu. Kiryushin, S. Piyadin, A. Stavinskiy, V. Kolesnikov, D. Finogeev, A. Kovalenko, M. Golubeva, M. Kapishin, A. Chebotov, D. Nikitin, A. Dryablov, J. Tanaka, Oleg B. Tarasov, Igor Gašparić, S. Kakurin, Or Hen, J. Kahlbow, F. Guber, Yu. Kopylov, O. Teryaev, V. Wagner, I. Selyuzhenkov, A. Malakhov, O. Streltsova, A. Kolozhvari, V. Burtsev, P. Alekseev, M. Rumyantsev, H. Törnqvist, E. Zherebtsova, S. Sedykh, P. Rukoyatkin, I. Gabdrakhmanov, A. Bolozdynya, A. Kugler, M. Shitenkov, N. Barbashina, N. Zhigareva, A. Izvestnyy, Yu. Kovalev, S. Kuklin, K. Roslon, N. Tarasov, O. Rogachevsky, A. Galavanov, S. Merts, Thomas Aumann, B. Dabrowska, V. Palchik, L. Kovachev, E. Atkin, R. Nagdasev, A. Maksymchyuk, V. Golovatyuk, N. Sukhov, J. Chen, G. Laskaris, E. Zubarev, V. Slepnev, T. Aushev, A. Sorin, B. Löher, S. Sergeev, V. Panin, V. Karjavin, A. Sheremeteva, E. Kulish, V. Sosnovtsev, G. Pokatashkin, G. Johansson, S. Buzin, K. Filippov, E. Streletskaya, M. Peryt, I. Mardor, Yu.P. Petukhov, V. Tarasov, H. Scheit, M. Zuev, P. Batyuk, V. Balandin, A. Shchipunov, I. Yaron, E. Ladygin, Song Zhang, D. Dabrowski, R. Cruz-Torres, A. Beck, T. Starecki, N. Voytishin, I. Tyapkin, A. Kisiel, and S. Afanasiev

Subjects
Physics, Hydrogen, Isotope, Scattering, Nuclear Theory, General Physics and Astronomy, chemistry.chemical_element, nuclear structure, experiments with inverse kinematics, quasi-free scattering, short-range correlations, 01 natural sciences, 010305 fluids & plasmas, Ion, Nuclear physics, chemistry, 0103 physical sciences, Particle, Facility for Antiproton and Ion Research, 010306 general physics, Nucleon, Wave function, Nuclear Experiment
Abstract

Particle knockout scattering experiments1,2 are fundamental for mapping the structure of atomic nuclei2–6, but their interpretation is often complicated by initial- and final-state interactions of the incoming and scattered particles1,2,7–9. Such interactions lead to reduction in the scattered particle flux and distort their kinematics. Here we overcome this limitation by measuring the quasi-free scattering of 48 GeV c–1 12C ions from hydrogen. The distribution of single protons is studied by detecting two protons at large angles in coincidence with an intact 11B nucleus. The 11B detection suppresses the otherwise large distortions of reconstructed single-proton distributions induced by initial- and final-state interactions. By further detecting residual 10B and 10Be nuclei, we also identified short-range correlated nucleon–nucleon pairs9–13 and provide direct experimental evidence for separation of the pair wavefunction from that of the residual many-body nuclear system9,14. All measured reactions are well described by theoretical calculations that include no distortions from the initial- and final-state interactions. Our results showcase the ability to study the short-distance structure of short-lived radioactive nuclei at the forthcoming Facility for Antiproton and Ion Research (FAIR)15 and Facility for Rare Isotope Beams (FRIB)16 facilities, which is relevant for understanding the structure and properties of nuclei far from stability and the formation of visible matter in the Universe. Initial- and final-state interactions distort the kinematics in particle knockout scattering experiments, complicating their interpretation. These effects are suppressed by detecting 11B nuclei in quasi-free scattering of 12C ions from hydrogen.

Published
2021

28. Search forK+→π+νν‾at NA62

Author

R. Volpe, G. Aglieri Rinella, R. Aliberti, F. Ambrosino, R. Ammendola, B. Angelucci, A. Antonelli, G. Anzivino, R. Arcidiacono, I. Azhinenko, S. Balev, M. Barbanera, J. Bendotti, A. Biagioni, L. Bician, C. Biino, A. Bizzeti, T. Blazek, A. Blik, B. Bloch-Devaux, V. Bolotov, V. Bonaiuto, M. Boretto, M. Bragadireanu, D. Britton, G. Britvich, M.B. Brunetti, D. Bryman, F. Bucci, F. Butin, E. Capitolo, C. Capoccia, T. Capussela, A. Cassese, A. Catinaccio, A. Cecchetti, A. Ceccucci, P. Cenci, V. Cerny, C. Cerri, B. Checcucci, O. Chikilev, S. Chiozzi, R. Ciaranfi, G. Collazuol, A. Conovaloff, P. Cooke, P. Cooper, G. Corradi, E. Cortina Gil, F. Costantini, F. Cotorobai, A. Cotta Ramusino, D. Coward, G. D'Agostini, J. Dainton, P. Dalpiaz, H. Danielsson, J. Degrange, N. De Simone, D. Di Filippo, L. Di Lella, S. Di Lorenzo, N. Dixon, N. Doble, B. Dobrich, V. Duk, V. Elsha, J. Engelfried, T. Enik, N. Estrada, V. Falaleev, R. Fantechi, V. Fascianelli, L. Federici, S. Fedotov, M. Fiorini, J. Fry, J. Fu, A. Fucci, L. Fulton, S. Gallorini, S. Galeotti, E. Gamberini, L. Gatignon, G. Georgiev, A. Gianoli, M. Giorgi, S. Giudici, L. Glonti, A. Goncalves Martins, F. Gonnella, E. Goudzovski, R. Guida, E. Gushchin, F. Hahn, B. Hallgren, H. Heath, F. Herman, T. Husek, O. Hutanu, D. Hutchcroft, L. Iacobuzio, E. Iacopini, E. Imbergamo, O. Jamet, P. Jarron, E. Jones, T. Jones, K. Kampf, J. Kaplon, V. Kekelidze, S. Kholodenko, G. Khoriauli, A. Khotyantsev, A. Khudyakov, Yu. Kiryushin, A. Kleimenova, K. Kleinknecht, A. Kluge, M. Koval, V. Kozhuharov, M. Krivda, Z. Kucerova, Yu. Kudenko, J. Kunze, G. Lamanna, G. Latino, C. Lazzeroni, G. Lehmann-Miotto, R. Lenci, M. Lenti, E. Leonardi, P. Lichard, R. Lietava, L. Litov, R. Lollini, D. Lomidze, A. Lonardo, M. Lupi, N. Lurkin, K. McCormick, D. Madigozhin, G. Maire, C. Mandeiro, I. Mannelli, G. Mannocchi, A. Mapelli, F. Marchetto, R. Marchevski, S. Martellotti, P. Massarotti, K. Massri, P. Matak, E. Maurice, A. Mefodev, E. Menichetti, E. Minucci, M. Mirra, M. Misheva, N. Molokanova, J. Morant, M. Morel, M. Moulson, S. Movchan, D. Munday, M. Napolitano, I. Neri, F. Newson, A. Norton, M. Noy, G. Nuessle, T. Numao, V. Obraztsov, A. Ostankov, S. Padolski, R. Page, V. Palladino, G. Paoluzzi, C. Parkinson, E. Pedreschi, M. Pepe, F. Perez Gomez, M. Perrin-Terrin, L. Peruzzo, P. Petrov, F. Petrucci, R. Piandani, M. Piccini, D. Pietreanu, J. Pinzino, I. Polenkevich, L. Pontisso, Yu. Potrebenikov, D. Protopopescu, F. Raffaelli, M. Raggi, P. Riedler, A. Romano, P. Rubin, G. Ruggiero, V. Russo, V. Ryjov, A. Salamon, G. Salina, V. Samsonov, C. Santoni, G. Saracino, F. Sargeni, V. Semenov, A. Sergi, M. Serra, A. Shaikhiev, S. Shkarovskiy, I. Skillicorn, D. Soldi, A. Sotnikov, V. Sugonyaev, M. Sozzi, T. Spadaro, F. Spinella, R. Staley, A. Sturgess, P. Sutcliffe, N. Szilasi, D. Tagnani, S. Trilov, M. Valdata-Nappi, P. Valente, M. Vasile, T. Vassilieva, B. Velghe, M. Veltri, S. Venditti, P. Vicini, M. Vormstein, H. Wahl, R. Wanke, P. Wertelaers, A. Winhart, R. Winston, B. Wrona, O. Yushchenko, M. Zamkovsky, and A. Zinchenko

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Meson, 010308 nuclear & particles physics, Physics beyond the Standard Model, NA62 experiment, 01 natural sciences, Measure (mathematics), Nuclear physics, Quality (physics), 0103 physical sciences, 010306 general physics
Abstract

Among the meson decays, K → π ν ν ‾ are the cleanest environment, from the theoretical point of view, where to search for new physics effects. The NA62 Experiment at CERN SPS aims to measure the BR ( K + → π + ν ν ‾ ) with a 10% precision by the end of 2018. It has been commissioned with technical runs in 2014 and 2015, and some preliminary results of the detector performances and quality of data are here reported.

Published
2017

30. Prospects forK+→π+νν‾observation at CERN in NA62

Author

G. Khoriauli, G. Aglieri Rinella, R. Aliberti, F. Ambrosino, B. Angelucci, A. Antonelli, G. Anzivino, R. Arcidiacono, I. Azhinenko, S. Balev, J. Bendotti, A. Biagioni, C. Biino, A. Bizzeti, T. Blazek, A. Blik, B. Bloch-Devaux, V. Bolotov, V. Bonaiuto, M. Bragadireanu, D. Britton, G. Britvich, F. Bucci, F. Butin, E. Capitolo, C. Capoccia, T. Capussela, V. Carassiti, N. Cartiglia, A. Cassese, A. Catinaccio, A. Cecchetti, A. Ceccucci, P. Cenci, V. Cerny, C. Cerri, B. Checcucci, O. Chikilev, R. Ciaranfi, G. Collazuol, A. Conovaloff, P. Cooke, P. Cooper, G. Corradi, E. Cortina Gil, F. Costantini, A. Cotta Ramusino, D. Coward, G. D'Agostini, J. Dainton, P. Dalpiaz, H. Danielsson, J. Degrange, N. De Simone, D. Di Filippo, L. Di Lella, N. Dixon, N. Doble, V. Duk, V. Elsha, J. Engelfried, T. Enik, V. Falaleev, R. Fantechi, V. Fascianelli, L. Federici, M. Fiorini, J. Fry, A. Fucci, L. Fulton, S. Gallorini, E. Gamberini, L. Gatignon, G. Georgiev, A. Gianoli, M. Giorgi, S. Giudici, L. Glonti, A. Goncalves Martins, F. Gonnella, E. Goudzovski, R. Guida, E. Gushchin, F. Hahn, B. Hallgren, H. Heath, F. Herman, D. Hutchcroft, E. Iacopini, E. Imbergamo, O. Jamet, P. Jarron, K. Kampf, J. Kaplon, V. Karjavin, V. Kekelidze, S. Kholodenko, A. Khudyakov, Yu. Kiryushin, K. Kleinknecht, A. Kluge, M. Koval, V. Kozhuharov, M. Krivda, Y. Kudenko, J. Kunze, G. Lamanna, C. Lazzeroni, R. Lenci, M. Lenti, E. Leonardi, P. Lichard, R. Lietava, L. Litov, D. Lomidze, A. Lonardo, N. Lurkin, D. Madigozhin, G. Maire, A. Makarov, C. Mandeiro, I. Mannelli, G. Mannocchi, A. Mapelli, F. Marchetto, R. Marchevski, S. Martellotti, P. Massarotti, K. Massri, P. Matak, E. Maurice, E. Menichetti, G. Mila, E. Minucci, M. Mirra, M. Misheva, N. Molokanova, J. Morant, M. Morel, M. Moulson, S. Movchan, D. Munday, M. Napolitano, I. Neri, F. Newson, A. Norton, M. Noy, G. Nuessle, V. Obraztsov, A. Ostankov, S. Padolski, R. Page, V. Palladino, A. Pardons, C. Parkinson, E. Pedreschi, M. Pepe, F. Perez Gomez, M. Perrin-Terrin, L. Peruzzo, P. Petrov, F. Petrucci, R. Piandani, M. Piccini, D. Pietreanu, J. Pinzino, M. Pivanti, I. Polenkevich, I. Popov, Yu. Potrebenikov, D. Protopopescu, F. Raffaelli, M. Raggi, P. Riedler, A. Romano, P. Rubin, G. Ruggiero, V. Russo, V. Ryjov, A. Salamon, G. Salina, V. Samsonov, C. Santoni, E. Santovetti, G. Saracino, F. Sargeni, S. Schifano, V. Semenov, A. Sergi, M. Serra, S. Shkarovskiy, D. Soldi, A. Sotnikov, V. Sougonyaev, M. Sozzi, T. Spadaro, F. Spinella, R. Staley, M. Statera, P. Sutcliffe, N. Szilasi, D. Tagnani, M. Valdata-Nappi, P. Valente, M. Vasile, T. Vassilieva, B. Velghe, M. Veltri, S. Venditti, R. Volpe, M. Vormstein, H. Wahl, R. Wanke, P. Wertelaers, A. Winhart, R. Winston, B. Wrona, O. Yushchenko, M. Zamkovsky, and A. Zinchenko

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, 010308 nuclear & particles physics, Branching fraction, Physics beyond the Standard Model, 0103 physical sciences, Sensitivity (control systems), 010306 general physics, 01 natural sciences, Standard Model
Published
2016

31. Progress in the construction of the NICA accelerator complex

Author

A. S. Sorin, V. Kolesnikov, V. Kekelidze, and Viktor Matveev

Subjects
Physics, Nuclotron, Mathematics::Operator Algebras, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, 010305 fluids & plasmas, law.invention, Nuclear physics, law, 0103 physical sciences, Physics::Accelerator Physics, Nuclear Experiment, 010306 general physics, Collider, Mathematical Physics
Abstract

The Nuclotron-based Ion Collider fAcility (NICA) is currently under construction at JINR (Dubna, Russia). The new facility will be a significant extension of the existing Nuclotron accelerator chain and comprises a sequence of machines for providing beams from protons to gold ions, as well as polarized protons and deuterons. The main goal of the Multi-Purpose Detector (MPD) experiment at NICA will be the study of a variety of phenomena in the region of the highest net-baryon density. This paper covers the scope of the NICA/MPD project and describes the recent progress in its realization.

Published
2020

32. Search for heavy neutral lepton production in K+ decays

Author

K. Massri, L. Di Lella, M. Misheva, M. Perrin-Terrin, V. Sugonyaev, H. O. Danielsson, L. Peruzzo, S. Giudici, B. Bloch-Devaux, L. Bician, Luca Federici, J. Swallow, B. Wrona, E. Imbergamo, G. D'Agostini, M. Pepe, Luca Pontisso, R. Aliberti, J. R. Fry, V. Palladino, Francesco Gonnella, G. Saracino, O. Hutanu, F. Bucci, A. Norton, Tomas Blazek, A. Fucci, A. Cotta Ramusino, M. Boretto, A. Conovaloff, Z. Kucerova, D. Soldi, G. Mannocchi, P. Cenci, Piero Vicini, Vladimir Ryjov, I. Mannelli, A. Mefodev, Alessandro Lonardo, P. Lichard, S. Movchan, L. Gatignon, A. Mapelli, J. Kunze, F. Ambrosino, T. Numao, Paolo Valente, L. Fulton, F. Duval, F. Hahn, Paul Laycock, V. Kekelidze, E. Cortina Gil, A. Salamon, G. Khoriauli, A. Korotkova, M. Koval, M. Corvino, Jürgen Engelfried, Roberto Piandani, D. Coward, Dave Britton, N. Estrada-Tristan, G. Anzivino, Leander Litov, F. Brizioli, A. Kleimenova, A. Romano, Fausto Sargeni, M. Sozzi, D. Lomidze, Yu. G. Kudenko, Evgueni Goudzovski, S. Padolski, A P Ostankov, Matthew Noy, R. Fantechi, Ilaria Neri, P. Petrov, O. Yushchenko, Cristina Biino, Vincenzo Bonaiuto, Andrea Bizzeti, T. Enik, Douglas Bryman, Sergei Fedotov, Cristina Lazzeroni, D. Protopopescu, Nicolas Lurkin, M. B. Brunetti, A. Khotyantsev, B. Velghe, Mattia Barbanera, V. Kurochka, B. Jenninger, A. Antonelli, V. Kurshetsov, G. Lanfranchi, A. Zinchenko, S. Kholodenko, M. Vormstein, R. Wanke, P. F. Dalpiaz, Mario Giorgi, D. Di Filippo, B. Checcucci, V. Cerny, G. Latino, P. Cooper, Andrea Biagioni, R. Volpe, G. Lamanna, E. Gamberini, D. Madigozhin, Georgi P. Georgiev, Viacheslav Duk, E. Menichetti, V. Kozhuharov, M. Fiorini, S. Martellotti, M. Zamkovsky, A. Filippi, Roberto Ammendola, P. Lubrano, B. Angelucci, F. Spinella, R. Lollini, T. Spadaro, Ernesto Migliore, H. D. Wahl, M. Piccini, N. Doble, David Hutchcroft, S. Trilov, R. Page, E. Maurice, Helen F Heath, V. Obraztsov, A. Sturgess, N. De Simone, C. Cerri, V. E. Semenov, A. M. Bragadireanu, P. Rubin, Paolo Massarotti, M. Moulson, F. Marchetto, Karol Kampf, N. A. Molokanova, M. Napolitano, J. Pinzino, E. Iacopini, Mauro Raggi, J. L. Fu, S. Venditti, A. Shaikhiev, S. Ghinescu, Claudio Santoni, T. Capussela, A. Gianoli, Roberto Guida, F. Petrucci, Tomáš Husek, Yu. Potrebenikov, Matteo Lupi, R. Marchevski, Antonino Sergi, G. Lehmann Miotto, C. Graham, V. Falaleev, M. Lenti, Babette Döbrich, F. Newson, C. J. Parkinson, S. Shkarovskiy, E. Minucci, J. B. Dainton, V. Fascianelli, L. Iacobuzio, Emilio Leonardi, I. Polenkevich, M. Medvedeva, Roberta Arcidiacono, E. Gushchin, Giuseppe Ruggiero, A. Ceccucci, E. Pedreschi, M. Mirra, F. Costantini, Cortina Gil, E., Minucci, E., Padolski, S., Petrov, P., Velghe, B., Georgiev, G., Kozhuharov, V., Litov, L., Numao, T., Bryman, D., Fu, J., Husek, T., Kampf, K., Zamkovsky, M., Aliberti, R., Khoriauli, G., Kunze, J., Lomidze, D., Marchevski, R., Peruzzo, L., Vormstein, M., Wanke, R., Dalpiaz, P., Fiorini, M., Gamberini, E., Neri, I., Norton, A., Petrucci, F., Wahl, H., Cotta Ramusino, A., Gianoli, A., Iacopini, E., Latino, G., Lenti, M., Bizzeti, A., Bucci, F., Volpe, R., Antonelli, A., Gonnella, F., Lamanna, G., Lanfranchi, G., Mannocchi, G., Martellotti, S., Moulson, M., Raggi, M., Spadaro, T., Ambrosino, F., Capussela, T., Corvino, Michele, Di Filippo, D., Massarotti, P., Mirra, M., Napolitano, M., Saracino, G., Anzivino, G., Brizioli, F., Imbergamo, E., Lollini, R., Santoni, C., Barbanera, M., Cenci, P., Checcucci, B., Duk, V., Lubrano, P., Lupi, M., Pepe, M., Piccini, M., Costantini, F., Di Lella, L., Doble, N., Giorgi, M., Giudici, S., Pedreschi, E., Sozzi, M., Cerri, C., Fantechi, R., Piandani, R., Pinzino, J., Pontisso, L., Spinella, F., Mannelli, I., D'Agostini, G., Biagioni, A., Leonardi, E., Lonardo, A., Valente, P., Vicini, P., Ammendola, R., Bonaiuto, V., De Simone, N., Federici, L., Fucci, A., Salamon, A., Sargeni, F., Arcidiacono, R., Bloch-Devaux, B., Boretto, M., Iacobuzio, L., Menichetti, E., Migliore, E., Soldi, D., Biino, C., Filippi, A., Marchetto, F., Engelfried, J., Estrada-Tristan, N., Bragadireanu, A. M., Ghinescu, S. A., Hutanu, O. E., Enik, T., Falaleev, V., Kekelidze, V., Korotkova, A., Madigozhin, D., Misheva, M., Molokanova, N., Movchan, S., Polenkevich, I., Potrebenikov, Yu., Shkarovskiy, S., Zinchenko, A., Fedotov, S., Gushchin, E., Khotyantsev, A., Kleimenova, A., Kudenko, Y., Kurochka, V., Medvedeva, M., Mefodev, A., Shaikhiev, A., Kholodenko, S., Kurshetsov, V., Obraztsov, V., Ostankov, A., Semenov, V., Sugonyaev, V., Yushchenko, O., Bician, L., Blazek, T., Cerny, V., Koval, M., Kucerova, Z., Ceccucci, A., Danielsson, H., Duval, F., Döbrich, B., Gatignon, L., Guida, R., Hahn, F., Jenninger, B., Laycock, P., Lehmann Miotto, G., Lichard, P., Mapelli, A., Noy, M., Palladino, V., Perrin-Terrin, M., Ruggiero, G., Ryjov, V., Venditti, S., Brunetti, M. B., Fascianelli, V., Goudzovski, E., Lazzeroni, C., Lurkin, N., Newson, F., Parkinson, C., Romano, A., Sergi, A., Sturgess, A., Swallow, J., Heath, H., Page, R., Trilov, S., Angelucci, B., Britton, D., Graham, C., Protopopescu, D., Dainton, J. B., Fry, J. R., Fulton, L., Hutchcroft, D., Massri, K., Maurice, E., Wrona, B., Conovaloff, A., Cooper, P., Coward, D., and Rubin, P.

Subjects
Nuclear and High Energy Physics, lepton, Pontecorvo–Maki–Nakagawa–Sakata matrix, heavy neutral leptons, neutrino mixing, FOS: Physical sciences, k meson, NA62 experiment, 01 natural sciences, neutrino mixing, Settore FIS/04 - Fisica Nucleare e Subnucleare, decay, High Energy Physics - Experiment, Nuclear physics, neutrino, High Energy Physics - Experiment (hep-ex), Minimum bias, Economica, Bounds, neutrinos, masses, tests, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, heavy neutral leptons, lepton, k meson, decay, neutrino, 010306 general physics, Nuclear Experiment, Physics, Range (particle radiation), Large Hadron Collider, 010308 nuclear & particles physics, hep-ex, High Energy Physics::Phenomenology, Ambientale, lcsh:QC1-999, High Energy Physics::Experiment, lcsh:Physics, Particle Physics - Experiment, Lepton
Abstract

A search for heavy neutral lepton production in $K^+$ decays using a data sample collected with a minimum bias trigger by the NA62 experiment at CERN in 2015 is reported. Upper limits at the $10^{-7}$ to $10^{-6}$ level are established on the elements of the extended neutrino mixing matrix $|U_{\ell 4}|^2$ ($\ell=e,\mu$) for heavy neutral lepton mass in the range $170-448~{\rm MeV}/c^2$. This improves on the results from previous production searches in $K^+$ decays, setting more stringent limits and extending the mass range., Comment: Version accepted for publication in Phys.Lett.B (12/01/2018)

Published
2018

33. NICA project management information system

Author

D. V. Kekelidze, Yu. Potrebenikov, Grigory Trubnikov, A. V. Philippov, S. V. Kuniaev, V. V. Morozov, Sergey Kostromin, M. V. Bashashin, and Vladimir Korenkov

Subjects
Physics, Nuclear and High Energy Physics, Radiation, OPM3, business.industry, Program management, 020206 networking & telecommunications, 02 engineering and technology, Atomic and Molecular Physics, and Optics, Project charter, Engineering management, Project planning, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, Radiology, Nuclear Medicine and imaging, Project management, Extreme project management, business, Software project management, Project management triangle
Abstract

The science projects growth, changing of the efficiency criteria during the project implementation require not only increasing of the management specialization level but also pose the problem of selecting the effective planning methods, monitoring of deadlines and interaction of participants involved in research projects. This paper is devoted to choosing the project management information system for the new heavy-ion collider NICA (Nuclotron based Ion Collider fAcility). We formulate the requirements for the project management information system with taking into account the specifics of the Joint Institute for Nuclear Research (JINR, Dubna, Russia) as an international intergovernmental research organization, which is developed on the basis of a flexible and effective information system for the NICA project management.

Published
2016

34. The Multi-Purpose Detector (MPD) of the collider experiment

Author

O. Rogachevsky, Alexander Sorin, V. Kolesnikov, V. Kekelidze, and V. Golovatyuk

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Nuclotron, Luminosity (scattering theory), Physics::Instrumentation and Detectors, Mathematics::Operator Algebras, 010308 nuclear & particles physics, Hadron, Detector, 01 natural sciences, law.invention, Baryon, Nuclear physics, law, 0103 physical sciences, Nuclear fusion, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Collider, Energy (signal processing)
Abstract

The project NICA (Nuclotron-based Ion Collider fAcility) is aimed to study dense baryonic matter in heavy-ion collisions in the energy range up to $ \sqrt{s_{NN}} = 11$ GeV with average luminosity of L = 1027 cm-2s-1 (for 197Au79). The experimental program at the NICA collider will be performed with the Multi-Purpose Detector (MPD). We report on the main physics objectives of the NICA heavy-ion program and present the main detector components.

Published
2016

35. Precise measurement of the decay KL → π0γγ

Author

A. Lai, D. Marras, A. Bevan, R.S. Dosanjh, T.J. Gershon, B. Hay, G.E. Kalmus, C. Lazzeroni, D.J. Munday, M.D. Needham, E. Olaiya, M.A. Parker, T.O. White, S.A. Wotton, G. Barr, G. Bocquet, A. Ceccucci, T. Cuhadar-Dönszelmann, D. Cundy, G. D'Agostini, N. Doble, V. Falaleev, L. Gatignon, A. Gonidec, B. Gorini, G. Govi, P. Grafström, W. Kubischta, A. Lacourt, M. Lenti, S. Luitz, I. Mikulec, A. Norton, S. Palestini, B. Panzer-Steindel, G. Tatishvili, H. Taureg, M. Velasco, H. Wahl, C. Cheshkov, P. Hristov, V. Kekelidze, D. Madigojine, N. Molokanova, Yu. Potrebenikov, A. Zinchenko, I. Knowles, V. Martin, R. Sacco, A. Walker, M. Contalbrigo, P. Dalpiaz, J. Duclos, P.L. Frabetti, A. Gianoli, M. Martini, F. Petrucci, M. Savrié, A. Bizzeti, M. Calvetti, G. Collazuol, G. Graziani, E. Iacopini, M. Veltri, H.G. Becker, M. Eppard, H. Fox, K. Holtz, A. Kalter, K. Kleinknecht, U. Koch, L. Köpke, P. Lopes da Silva, P. Maruelli, I. Pellmann, A. Peters, B. Renk, S.A. Schmidt, V. Schönharting, Y. Schué, R. Wanke, A. Winhart, M. Wittgen, J.C. Chollet, L. Fayard, L. Iconomidou-Fayard, J. Ocariz, G. Unal, I. Wingerter-Seez, G. Anzivino, P. Cenci, E. Imbergamo, P. Lubrano, A. Mestvirishvili, A. Nappi, M. Pepe, M. Piccini, R. Carosi, R. Casali, C. Cerri, M. Cirilli, F. Costantini, R. Fantechi, S. Giudici, I. Mannelli, G. Pierazzini, M. Sozzi, J.B. Cheze, J. Cogan, M. De Beer, P. Debu, A. Formica, R. Granier de Cassagnac, E. Mazzucato, B. Peyaud, R. Turlay, B. Vallage, M. Holder, A. Maier, M. Ziolkowski, R. Arcidiacono, C. Biino, N. Cartiglia, M. Clemencic, F. Marchetto, E. Menichetti, N. Pastrone, J. Nassalski, E. Rondio, M. Szleper, W. Wislicki, S. Wronka, H. Dibon, G. Fischer, M. Jeitler, M. Markytan, G. Neuhofer, M. Pernicka, A. Taurok, and L. Widhalm

Subjects
mesoni K, decadimenti rari, Physics, Coupling constant, Nuclear and High Energy Physics, Particle physics, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Gamma gamma, Pi, High Energy Physics::Experiment, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract

The decay rate of $\klpgg$ has been measured with the NA48 detector at the CERN SPS. A total of 2558 $\klpgg$ candidates have been observed with a residual background of 3.2%. The branching ratio is determined to be $(1.36 \pm0.03_{(stat)} \pm0.03_{(syst)}\pm 0.03_{(norm)})\times10^{-6}$ and the vector coupling constant $a_v = -0.46 \pm0.03_{(stat)} \pm0.04_{(syst)}$. This result suggests that the CP-violation effects are dominating in the $\klpee$ decay. An upper limit for the $\klpgg$ decay rate in the two photon mass region $m_{\gamma\gamma}

Published
2016

36. Study of the rare decay K± ->pi±gg

Author

AMBROSINO, FABIO, DI FILIPPO, DOMENICO, MASSAROTTI, PAOLO, SARACINO, GIULIO, A. Antonelli, G. Anzivino, R. Arcidiacono, W. Baldini, S. Balev, J. R. Batley, M. Behler, S. Bifani, C. Biino, A. Bizzeti, B. Bloch Devaux, G. Bocquet, V. Bolotov, F. Bucci, N. Cabibbo, M. Calvetti, N. Cartiglia, A. Cassese, A. Ceccucci, P. Cenci, C. Cerri, C. Cheshkov, J. B. Chèze, M. Clemencic, G. Collazuol, F. Costantini, A. Cotta Ramusino, D. Coward, D. Cundy, A. Dabrowski, G. D???Agostini, P. Dalpiaz, C. Damiani, H. Danielsson, M. De Beer, G. Dellacasa, J. Derré, H. Dibon, L. DiLella, N. Doble, V. Duk, J. Engelfried, K. Eppard, V. Falaleev, R. Fantechi, M. Fidecaro, L. Fiorini, M. Fiorini, T. Fonseca Martin, P. L. Frabetti, A. Fucci, S. Gallorini, L. Gatignon, E. Gersabeck, A. Gianoli, S. Giudici, A. Gonidec, E. Goudzovski, S. Goy Lopez, E. Gushchin, B. Hallgren, M. Hita Hochgesand, M. Holder, P. Hristov, E. Iacopini, E. Imbergamo, M. Jeitler, G. Kalmus, V. Kekelidze, K. Kleinknecht, V. Kozhuharov, W. Kubischta, V. Kurshetsov, G. Lamanna, C. Lazzeroni, M. Lenti, E. Leonardi, L. Litov, D. Madigozhin, A. Maier, I. Mannelli, F. Marchetto, G. Marel, M. Markytan, P. Marouelli, M. Martini, L. Masetti, E. Mazzucato, A. Michetti, I. Mikulec, M. Misheva, N. Molokanova, E. Monnier, U. Moosbrugger, C. Morales Morales, M. Moulson, S. Movchan, D. J. Munday, M. Napolitano, A. Nappi, G. Neuhofer, A. Norton, T. Numao, V. Obraztsov, V. Palladino, M. Patel, M. Pepe, A. Peters, F. Petrucci, M. C. Petrucci, B. Peyaud, R. Piandani, M. Piccini, G. Pierazzini, I. Polenkevich, I. Popov, Y.u. Potrebenikov, M. Raggi, B. Renk, F. Retière, P. Riedler, A. Romano, P. Rubin, G. Ruggiero, A. Salamon, M. Savrié, M. Scarpa, V. Semenov, A. Sergi, M. Serra, M. Shieh, S. Shkarovskiy, M. W. Slater, M. Sozzi, T. Spadaro, S. Stoynev, E. Swallow, M. Szleper, M. Valdata Nappi, P. Valente, B. Vallage, M. Velasco, M. Veltri, S. Venditti, M. Wache, H. Wahl, A. Walker, R. Wanke, L. Widhalm, A. Winhart, R. Winston, M. D. Wood, S. A. Wotton, O. Yushchenko, A. Zinchenko, M. Ziolkowski, Ambrosino, Fabio, A., Antonelli, G., Anzivino, R., Arcidiacono, W., Baldini, S., Balev, J. R., Batley, M., Behler, S., Bifani, C., Biino, A., Bizzeti, B., Bloch Devaux, G., Bocquet, V., Bolotov, F., Bucci, N., Cabibbo, M., Calvetti, N., Cartiglia, A., Cassese, A., Ceccucci, P., Cenci, C., Cerri, C., Cheshkov, J. B., Chèze, M., Clemencic, G., Collazuol, F., Costantini, A., Cotta Ramusino, D., Coward, D., Cundy, A., Dabrowski, G., D???agostini, P., Dalpiaz, C., Damiani, H., Danielsson, M., De Beer, G., Dellacasa, J., Derré, H., Dibon, DI FILIPPO, Domenico, L., Dilella, N., Doble, V., Duk, J., Engelfried, K., Eppard, V., Falaleev, R., Fantechi, M., Fidecaro, L., Fiorini, M., Fiorini, T., Fonseca Martin, P. L., Frabetti, A., Fucci, S., Gallorini, L., Gatignon, E., Gersabeck, A., Gianoli, S., Giudici, A., Gonidec, E., Goudzovski, S., Goy Lopez, E., Gushchin, B., Hallgren, M., Hita Hochgesand, M., Holder, P., Hristov, E., Iacopini, E., Imbergamo, M., Jeitler, G., Kalmu, V., Kekelidze, K., Kleinknecht, V., Kozhuharov, W., Kubischta, V., Kurshetsov, G., Lamanna, C., Lazzeroni, M., Lenti, E., Leonardi, L., Litov, D., Madigozhin, A., Maier, I., Mannelli, F., Marchetto, G., Marel, M., Markytan, P., Marouelli, M., Martini, L., Masetti, Massarotti, Paolo, E., Mazzucato, A., Michetti, I., Mikulec, M., Misheva, N., Molokanova, E., Monnier, U., Moosbrugger, C., Morales Morale, M., Moulson, S., Movchan, D. J., Munday, M., Napolitano, A., Nappi, G., Neuhofer, A., Norton, T., Numao, V., Obraztsov, V., Palladino, M., Patel, M., Pepe, A., Peter, F., Petrucci, M. C., Petrucci, B., Peyaud, R., Piandani, M., Piccini, G., Pierazzini, I., Polenkevich, I., Popov, Potrebenikov, Y. u., M., Raggi, B., Renk, F., Retière, P., Riedler, A., Romano, P., Rubin, G., Ruggiero, A., Salamon, Saracino, Giulio, M., Savrié, M., Scarpa, V., Semenov, A., Sergi, M., Serra, M., Shieh, S., Shkarovskiy, M. W., Slater, M., Sozzi, T., Spadaro, S., Stoynev, E., Swallow, M., Szleper, M., Valdata Nappi, P., Valente, B., Vallage, M., Velasco, M., Veltri, S., Venditti, M., Wache, H., Wahl, A., Walker, R., Wanke, L., Widhalm, A., Winhart, R., Winston, M. D., Wood, S. A., Wotton, O., Yushchenko, A., Zinchenko, and M., Ziolkowski

Published
2014

37. Lepton flavour universality and conservation tests in Kaon decays at CERN

Author

AMBROSINO, FABIO, DI FILIPPO, DOMENICO, MASSAROTTI, PAOLO, SARACINO, GIULIO, A. Antonelli, G. Anzivino, R. Arcidiacono, W. Baldini, S. Balev, J. R. Batley, M. Behler, S. Bifani, C. Biino, A. Bizzeti, B. Bloch Devaux, G. Bocquet, V. Bolotov, F. Bucci, N. Cabibbo, M. Calvetti, N. Cartiglia, A. Ceccucci, P. Cenci, C. Cerri, C. Cheshkov, J. B. Chèze, M. Clemencic, G. Collazuol, F. Costantini, A. Cotta Ramusino, D. Coward, D. Cundy, A. Dabrowski, G. D???Agostini, P. Dalpiaz, C. Damiani, H. Danielsson, M. De Beer, G. Dellacasa, J. Derré, H. Dibon, L. DiLella, N. Doble, V. Duk, J. Engelfried, K. Eppard, V. Falaleev, R. Fantechi, M. Fidecaro, L. Fiorini, M. Fiorini, T. Fonseca Martin, P. L. Frabetti, A. Fucci, S. Gallorini, L. Gatignon, E. Gersabeck, A. Gianoli, S. Giudici, A. Gonidec, E. Goudzovski, S. Goy Lopez, E. Gushchin, B. Hallgren, M. Hita Hochgesand, M. Holder, P. Hristov, E. Iacopini, E. Imbergamo, M. Jeitler, G. Kalmus, V. Kekelidze, K. Kleinknecht, V. Kozhuharov, W. Kubischta, V. Kurshetsov, G. Lamanna, C. Lazzeroni, M. Lenti, E. Leonardi, L. Litov, D. Madigozhin, A. Maier, I. Mannelli, F. Marchetto, G. Marel, M. Markytan, P. Marouelli, M. Martini, L. Masetti, E. Mazzucato, A. Michetti, I. Mikulec, M. Misheva, N. Molokanova, E. Monnier, U. Moosbrugger, C. Morales Morales, M. Moulson, S. Movchan, D. J. Munday, M. Napolitano, A. Nappi, G. Neuhofer, A. Norton, T. Numao, V. Obraztsov, V. Palladino, M. Patel, M. Pepe, A. Peters, F. Petrucci, M. C. Petrucci, B. Peyaud, R. Piandani, M. Piccini, G. Pierazzini, I. Polenkevich, I. Popov, Y.u. Potrebenikov, M. Raggi, B. Renk, F. Retière, P. Riedler, A. Romano, P. Rubin, G. Ruggiero, A. Salamon, M. Savrié, M. Scarpa, V. Semenov, A. Sergi, M. Serra, M. Shieh, S. Shkarovskiy, M. W. Slater, M. Sozzi, T. Spadaro, S. Stoynev, E. Swallow, M. Szleper, M. Valdata Nappi, P. Valente, B. Vallage, M. Velasco, M. Veltri, S. Venditti, M. Wache, H. Wahl, A. Walker, R. Wanke, L. Widhalm, A. Winhart, R. Winston, M. D. Wood, S. A. Wotton, O. Yushchenko, A. Zinchenko, M. Z.i.o.l.k.o.w.s.k.i., Ambrosino, Fabio, A., Antonelli, G., Anzivino, R., Arcidiacono, W., Baldini, S., Balev, J. R., Batley, M., Behler, S., Bifani, C., Biino, A., Bizzeti, B., Bloch Devaux, G., Bocquet, V., Bolotov, F., Bucci, N., Cabibbo, M., Calvetti, N., Cartiglia, A., Ceccucci, P., Cenci, C., Cerri, C., Cheshkov, J. B., Chèze, M., Clemencic, G., Collazuol, F., Costantini, A., Cotta Ramusino, D., Coward, D., Cundy, A., Dabrowski, G., D???agostini, P., Dalpiaz, C., Damiani, H., Danielsson, M., De Beer, G., Dellacasa, J., Derré, H., Dibon, DI FILIPPO, Domenico, L., Dilella, N., Doble, V., Duk, J., Engelfried, K., Eppard, V., Falaleev, R., Fantechi, M., Fidecaro, L., Fiorini, M., Fiorini, T., Fonseca Martin, P. L., Frabetti, A., Fucci, S., Gallorini, L., Gatignon, E., Gersabeck, A., Gianoli, S., Giudici, A., Gonidec, E., Goudzovski, S., Goy Lopez, E., Gushchin, B., Hallgren, M., Hita Hochgesand, M., Holder, P., Hristov, E., Iacopini, E., Imbergamo, M., Jeitler, G., Kalmu, V., Kekelidze, K., Kleinknecht, V., Kozhuharov, W., Kubischta, V., Kurshetsov, G., Lamanna, C., Lazzeroni, M., Lenti, E., Leonardi, L., Litov, D., Madigozhin, A., Maier, I., Mannelli, F., Marchetto, G., Marel, M., Markytan, P., Marouelli, M., Martini, L., Masetti, Massarotti, Paolo, E., Mazzucato, A., Michetti, I., Mikulec, M., Misheva, N., Molokanova, E., Monnier, U., Moosbrugger, C., Morales Morale, M., Moulson, S., Movchan, D. J., Munday, M., Napolitano, A., Nappi, G., Neuhofer, A., Norton, T., Numao, V., Obraztsov, V., Palladino, M., Patel, M., Pepe, A., Peter, F., Petrucci, M. C., Petrucci, B., Peyaud, R., Piandani, M., Piccini, G., Pierazzini, I., Polenkevich, I., Popov, Potrebenikov, Y. u., M., Raggi, B., Renk, F., Retière, P., Riedler, A., Romano, P., Rubin, G., Ruggiero, A., Salamon, Saracino, Giulio, M., Savrié, M., Scarpa, V., Semenov, A., Sergi, M., Serra, M., Shieh, S., Shkarovskiy, M. W., Slater, M., Sozzi, T., Spadaro, S., Stoynev, E., Swallow, M., Szleper, M., Valdata Nappi, P., Valente, B., Vallage, M., Velasco, M., Veltri, S., Venditti, M., Wache, H., Wahl, A., Walker, R., Wanke, L., Widhalm, A., Winhart, R., Winston, M. D., Wood, S. A., Wotton, O., Yushchenko, A., Zinchenko, and M. Z. i. o. l. k. o. w. s. k., I.

Subjects
Physics, Particle physics, Large Hadron Collider, Branching fraction, QC1-999, High Energy Physics::Phenomenology, Flavour, NA62 experiment, Lepton number, Helicity, Universality (dynamical systems), Nuclear physics, High Energy Physics::Experiment, Lepton
Abstract

A test of lepton flavour conservation in kaon rare decays by the NA48/2 experiment at CERN SPS is presented. The improved upper limit on the rate of the lepton number violating decay K ± → π ∓ μ ± μ ± is established with the data sample collected in 2003–2004. A precision test of lepton flavour universality in kaon rare decays by the successor NA62 experiment at CERN SPS is reported. The helicity suppressed ratio R K = Γ(K ± → e ± ν )/Γ(K ± → μ ± ν ) is measured with a 0.4% precision using the data sample collected in 2007–2008 and is consistent with the prediction of the Standard Model. The main goal of the NA62 experiment is to measure the branching ratio of the ultra-rare K + → π + ν ν decay with 10% accuracy. This will be achieved by collecting ∼ 1013 K + decays in the fiducial volume. The NA62 estimated sensitivities to rare and forbidden decays of K + and π 0 , including lepton flavour and number violating modes, and the NA62 potential to improve on several experimental limits are discussed.

Published
2014

38. Precision tests of the Standard Model with Kaon decays at CERN

Author

G. Lamanna, F. Ambrosino, A. Antonelli, G. Anzivino, R. Arcidiacono, W. Baldini, S. Balev, J.R. Batley, M. Behler, S. Bifani, C. Biino, A. Bizzeti, B. Bloch-Devaux, G. Bocquet, V. Bolotov, F. Bucci, N. Cabibbo, M. Calvetti, N. Cartiglia, A. Ceccucci, P. Cenci, C. Cerri, C. Cheshkov, J.B. Chèze, M. Clemencic, G. Collazuol, F. Costantini, A. Cotta Ramusino, D. Coward, D. Cundy, A. Dabrowski, G. D'Agostini, P. Dalpiaz, C. Damiani, H. Danielsson, M. De Beer, G. Dellacasa, J. Derré, H. Dibon, D. Di Filippo, L. DiLella, N. Doble, V. Duk, J. Engelfried, K. Eppard, V. Falaleev, R. Fantechi, M. Fidecaro, L. Fiorini, M. Fiorini, T. Fonseca Martin, P.L. Frabetti, A. Fucci, S. Gallorini, L. Gatignon, E. Gersabeck, A. Gianoli, S. Giudici, A. Gonidec, E. Goudzovski, S. Goy Lopez, E. Gushchin, B. Hallgren, M. Hita-Hochgesand, M. Holder, P. Hristov, E. Iacopini, E. Imbergamo, M. Jeitler, G. Kalmus, V. Kekelidze, K. Kleinknecht, V. Kozhuharov, W. Kubischta, V. Kurshetsov, C. Lazzeroni, M. Lenti, E. Leonardi, L. Litov, D. Madigozhin, A. Maier, I. Mannelli, F. Marchetto, G. Marel, M. Markytan, P. Marouelli, M. Martini, L. Masetti, P. Massarotti, E. Mazzucato, A. Michetti, I. Mikulec, M. Misheva, N. Molokanova, E. Monnier, U. Moosbrugger, C. Morales Morales, M. Moulson, S. Movchan, D.J. Munday, M. Napolitano, A. Nappi, G. Neuhofer, A. Norton, T. Numao, V. Obraztsov, V. Palladino, M. Patel, M. Pepe, A. Peters, F. Petrucci, M.C. Petrucci, B. Peyaud, R. Piandani, M. Piccini, G. Pierazzini, I. Polenkevich, I. Popov, Yu. Potrebenikov, M. Raggi, B. Renk, F. Retière, P. Riedler, A. Romano, P. Rubin, G. Ruggiero, A. Salamon, G. Saracino, M. Savrié, M. Scarpa, V. Semenov, A. Sergi, M. Serra, M. Shieh, S. Shkarovskiy, M.W. Slater, M. Sozzi, T. Spadaro, S. Stoynev, E. Swallow, M. Szleper, M. Valdata-Nappi, P. Valente, B. Vallage, M. Velasco, M. Veltri, S. Venditti, M. Wache, H. Wahl, A. Walker, R. Wanke, L. Widhalm, A. Winhart, R. Winston, M.D. Wood, S.A. Wotton, O. Yushchenko, A. Zinchenko, M. Ziolkowski, Lamanna, G., Ambrosino, Fabio, Antonelli, A., Anzivino, G., Arcidiacono, R., Baldini, W., Balev, S., Batley, J. R., Behler, M., Bifani, S., Biino, C., Bizzeti, A., Bloch Devaux, B., Bocquet, G., Bolotov, V., Bucci, F., Cabibbo, N., Calvetti, M., Cartiglia, N., Ceccucci, A., Cenci, P., Cerri, C., Cheshkov, C., Chèze, J. B., Clemencic, M., Collazuol, G., Costantini, F., Cotta Ramusino, A., Coward, D., Cundy, D., Dabrowski, A., D'Agostini, G., Dalpiaz, P., Damiani, C., Danielsson, H., De Beer, M., Dellacasa, G., Derré, J., Dibon, H., DI FILIPPO, Domenico, Dilella, L., Doble, N., Duk, V., Engelfried, J., Eppard, K., Falaleev, V., Fantechi, R., Fidecaro, M., Fiorini, L., Fiorini, M., Fonseca Martin, T., Frabetti, P. L., Fucci, A., Gallorini, S., Gatignon, L., Gersabeck, E., Gianoli, A., Giudici, S., Gonidec, A., Goudzovski, E., Goy Lopez, S., Gushchin, E., Hallgren, B., Hita Hochgesand, M., Holder, M., Hristov, P., Iacopini, E., Imbergamo, E., Jeitler, M., Kalmus, G., Kekelidze, V., Kleinknecht, K., Kozhuharov, V., Kubischta, W., Kurshetsov, V., Lazzeroni, C., Lenti, M., Leonardi, E., Litov, L., Madigozhin, D., Maier, A., Mannelli, I., Marchetto, F., Marel, G., Markytan, M., Marouelli, P., Martini, M., Masetti, L., Massarotti, Paolo, Mazzucato, E., Michetti, A., Mikulec, I., Misheva, M., Molokanova, N., Monnier, E., Moosbrugger, U., Morales Morales, C., Moulson, M., Movchan, S., Munday, D. J., Napolitano, Marco, Nappi, A., Neuhofer, G., Norton, A., Numao, T., Obraztsov, V., Palladino, Vito, Patel, M., Pepe, M., Peters, A., Petrucci, F., Petrucci, M. C., Peyaud, B., Piandani, R., Piccini, M., Pierazzini, G., Polenkevich, I., Popov, I., Potrebenikov, Y. u., Raggi, M., Renk, B., Retière, F., Riedler, P., Romano, A., Rubin, P., Ruggiero, G., Salamon, A., Saracino, Giulio, Savrié, M., Scarpa, M., Semenov, V., Sergi, A., Serra, M., Shieh, M., Shkarovskiy, S., Slater, M. W., Sozzi, M., Spadaro, T., Stoynev, S., Swallow, E., Szleper, M., Valdata Nappi, M., Valente, P., Vallage, B., Velasco, M., Veltri, M., Venditti, S., Wache, M., Wahl, H., Walker, A., Wanke, R., Widhalm, L., Winhart, A., Winston, R., Wood, M. D., Wotton, S. A., Yushchenko, O., Zinchenko, A., and Ziolkowski, M.

Subjects
Physics, Particle physics, Nuclear and High Energy Physics, Large Hadron Collider, kaon decays, 010308 nuclear & particles physics, Physics beyond the Standard Model, Flavor-changing neutral current, kaon decays, lepton number violation, High Energy Physics::Phenomenology, Clean environment, NA62 experiment, 01 natural sciences, Standard Model, Nuclear physics, lepton number violation, Kaon Physics, Lepton Flavour Violation, NA62, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Particle Physics - Experiment, Particle Physics - Phenomenology, Lepton
Abstract

Effects of new physics in flavor could be found both in Flavor Changing Neutral Current (FCNC) processes and in Lepton Flavor Violation (LFV) modes. The former offer the possibility to deeply test the standard model in a clean environment, while the latter are sensitive to contribution from several models beyond the standard model. In the Kaon sector both FCNC and LFV will be investigated in the NA62 experiment. In addition the kaons sector is an ideal place where to look for new particles and tiny effects, in the region of hundreds of MeV/ c 2 . In this paper prospects for exotic searches in NA62 will be presented, together with recent results from NA48/2 and NA62-RK on LFV kaon decays modes.

Published
2016

39. Model independent measurement of the leptonic kaon decay $K^{\pm}\to \mu^{\pm}\nu_{\mu}e^{+} e^-$ with the NA48/2 experiment

Author

Radoslav Marchevski, G. Anzivino, R. Arcidiacono, W. Baldini, S. Balev, J.R. Batley, M. Behler, S. Bifani, C. Biino, A. Bizzeti, B. Bloch-Devaux, G. Bocquet, N. Cabibbo, M. Calvetti, N. Cartiglia, A. Ceccucci, P. Cenci, C. Cerri, C. Cheshkov, J.B. Chèze, M. Clemencic, G. Collazuol, F. Costantini, A. Cotta Ramusino, D. Coward, D. Cundy, A. Dabrowski, P. Dalpiaz, C. Damiani, M. De Beer, J. Derré, H. Dibon, L. DiLella, N. Doble, K. Eppard, V. Falaleev, R. Fantechi, M. Fidecaro, L. Fiorini, M. Fiorini, T. Fonseca Martin, P.L. Frabetti, L. Gatignon, E. Gersabeck, A. Gianoli, S. Giudici, A. Gonidec, E. Goudzovski, S. Goy Lopez, M. Holder, P. Hristov, E. Iacopini, E. Imbergamo, M. Jeitler, G. Kalmus, V. Kekelidze, K. Kleinknecht, V. Kozhuharov, W. Kubischta, G. Lamanna, C. Lazzeroni, M. Lenti, L. Litov, D. Madigozhin, A. Maier, I. Mannelli, F. Marchetto, G. Marel, M. Markytan, P. Marouelli, M. Martini, L. Masetti, E. Mazzucato, A. Michetti, I. Mikulec, N. Molokanova, E. Monnier, U. Moosbrugger, C. Morales Morales, D.J. Munday, A. Nappi, G. Neuhofer, A. Norton, M. Patel, M. Pepe, A. Peters, F. Petrucci, M.C. Petrucci, B. Peyaud, M. Piccini, G. Pierazzini, I. Polenkevich, Yu. Potrebenikov, M. Raggi, B. Renk, P. Rubin, Giuseppe Ruggiero, M. Savrié, M. Scarpa, M. Shieh, M.W. Slater, M. Sozzi, S. Stoynev, E. Swallow, M. Szleper, M. Valdata-Nappi, B. Vallage, M. Velasco, M. Veltri, S. Venditti, M. Wache, H. Wahl, A. Walker, R. Wanke, L. Widhalm, A. Winhart, R. Winston, M.D. Wood, S.A. Wotton, A. Zinchenko, and M. Ziolkowski

Subjects
Quantum chromodynamics, Physics, Particle physics, Chiral perturbation theory, Low energy, Branching fraction, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract

A measurement of the branching ratio of the rare leptonic kaon decay $K^\pm \rightarrow \mu^\pm \nu_{\mu} e^+ e^- $ is presented using data collected by the NA48/2 experiment in 2003 and 2004. The measurement is performed in the region $M_{ee} > 140$~MeV/c$^2$. In this particular region low energy QCD contributions become important and can be calculated in the framework of Chiral Perturbation Theory (ChPT). From a total number of $1.56 \times 10^{11}$ recorded kaon decays, the branching ratio is measured to be $\mathcal{B} \left( K^\pm \rightarrow \mu^\pm \nu_{\mu} e^+ e^- | M_{ee} > 140~ MeV/c^2 \right) = (7.8 \pm 0.2) \times 10^{-8} $.

Published
2016

40. Measurement of Kμ30 form factors

Author

M. Sozzi, P. Debu, M. Cirilli, G. Fischer, S. A. Wotton, Konrad Kleinknecht, H. D. Wahl, E. Iacopini, H.G. Becker, P. Grafström, P. Lubrano, B. Peyaud, Anton Taurok, M. Eppard, A. Winhart, Nadia Pastrone, Benedetto Gorini, Cristina Biino, Ivan Mikulec, J. C. Chollet, V. Kekelidze, S.A. Schmidt, I.G. Knowles, B. Vallage, Milene Calvetti, Manfred Jeitler, I. Wingerter-Seez, H. Taureg, S. Wronka, H. Fox, R. Turlay, M. Wittgen, A. Lacourt, J. Cogan, A. Kalter, A. Gonidec, M. Markytan, H. Dibon, T.O. White, G. Unal, G. Collazuol, J. Duclos, G. Anzivino, A. Peters, Adrian John Bevan, E. Rondio, J. Ocariz, G. Graziani, G.D. Barr, C. Cheshkov, R. Fantechi, I. Mannelli, L. Gatignon, T.J. Gershon, Roberta Arcidiacono, Andrea Bizzeti, M. Lenti, B. Renk, G. Bocquet, Wojciech Wislicki, B. Panzer-Steindel, D. Madigozhin, R. Casali, M. De Beer, J.B. Cheze, U. Koch, A. Nappi, V. Falaleev, M. Piccini, Michael Ziolkowski, M. Contalbrigo, A. Zinchenko, Alexi Mestvirishvili, Louis Fayard, T. Cuhadar-Dönszelmann, R. Wanke, R.S. Dosanjh, R. Bernhard, N. Doble, L. Widhalm, Cristina Lazzeroni, A. Ceccucci, S. Stoynev, M. Martini, B. Hay, A. Maier, P. Hristov, A. Lai, I. Pellmann, S. Giudici, Andrea Formica, Giuseppe Ruggiero, D.J. Munday, Michal Szleper, A. Norton, J. Nassalski, L. Köpke, C. Cerri, E. Imbergamo, M. Pernicka, M. Savrie, E. Menichetti, F. Costantini, M. Pepe, G.E. Kalmus, G. D'Agostini, G. Govi, Nicolo Cartiglia, P. Cenci, Michael Andrew Parker, W. Kubischta, P. F. Dalpiaz, V. Schönharting, M. Holder, M. Veltri, G.M. Pierazzini, P. Lopes da Silva, Lydia Iconomidou-Fayard, P. Marouelli, L. Bertanza, G. Neuhofer, R. Carosi, D.C. Cundy, Y. Schué, R. Sacco, A. Gianoli, R. Granier de Cassagnac, E. Olaiya, Yu. Potrebenikov, E. Mazzucato, F. Petrucci, Victoria Jane Martin, Mayda Velasco, Sandro Palestini, F. Marchetto, N. A. Molokanova, K. Eppard, Leander Litov, P.L. Frabetti, Alan W. Walker, and D. Marras

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, 0103 physical sciences, Form factor (quantum field theory), Dalitz plot, NA48 experiment, 010306 general physics, 01 natural sciences
Abstract

This Letter reports on a new high precision measurement of the form factors of the K L → π ± μ ∓ ν μ decay. The data sample of about 2.3 × 10 6 events was recorded in 1999 by the NA48 experiment at CERN. Studying the Dalitz plot density we measured a linear, λ + ′ = ( 20.5 ± 2.2 stat ± 2.4 syst ) × 10 −3 , and a quadratic, λ + ″ = ( 2.6 ± 0.9 stat ± 1.0 syst ) × 10 −3 term in the power expansion of the vector form factor. No evidence was found for a second order term for the scalar form factor; the linear slope was determined to be λ 0 = ( 9.5 ± 1.1 stat ± 0.8 syst ) × 10 −3 . Using a linear fit our results were: λ + = ( 26.7 ± 0.6 stat ± 0.8 syst ) × 10 −3 and λ 0 = ( 11.7 ± 0.7 stat ± 1.0 syst ) × 10 −3 . A pole fit of the form factors yields: m V = ( 905 ± 9 stat ± 17 syst ) MeV / c 2 and m S = ( 1400 ± 46 stat ± 53 syst ) MeV / c 2 .

Published
2007

41. Measurements of charged kaon semileptonic decay branching fractions K±→π0μ±ν and K±→π0e±ν and their ratio

Author

G. Ruggiero, G.M. Pierazzini, Evgueni Goudzovski, A. Gonidec, Peter Zahariev Hristov, G. Collazuol, Fabrizio Petrucci, V. Falaleev, Manfred Jeitler, G. Anzivino, P. F. Dalpiaz, B. Vallage, Cristina Biino, M. Fiorini, L. Gatignon, M. Scarpa, Mayda Velasco, Leander Litov, Enrico Celeghini, A.I. Zinchenko, A. Dabrowski, M. Sozzi, R. Fantechi, Maulik R. Patel, M. C. Petrucci, E. Monnier, A. Winhart, Jacqueline Batley, T. Fonseca Martin, Cvetan Valeriev Cheshkov, F. Marchetto, Mauro Piccini, S. A. Wotton, Milene Calvetti, L. Widhalm, G. Marel, M. De Beer, U. Moosbrugger, L. DiLella, A. Gianoli, Alan W. Walker, A. Cotta Ramusino, I. Mannelli, Rainer Wanke, H. Dibon, A. Peters, M. Markytan, M. Lenti, Konrad Kleinknecht, E. Marinova, M. Wache, D. T. Madigozhin, G. Neuhofer, Ivan Mikulec, M. Holder, Mauro Raggi, J. Derre, E. Mazzucato, N. A. Molokanova, D.C. Cundy, K. Eppard, Stoyan Stoynev, M. Behler, D. Coward, M. Valdata-Nappi, W. Kubischta, E. C. Swallow, G. Lamanna, M. Szleper, L. Masetti, Roberta Arcidiacono, D. J. Munday, M. Pepe, E. Iacopini, S. Giudici, Luca Fiorini, J. B. Cheze, B. Renk, G. Bocquet, E. Imbergamo, S. Balev, M. Martini, P. L. Frabetti, P. Rubin, Simone Bifani, P. Cenci, C. Morales, A. Michetti, Nicola Cabibbo, V. Kozhuharov, C. Lazzeroni, M. Savrie, M. Ziolkowski, V. Kekelidze, M. Shieh, H. D. Wahl, M. Fidecaro, B. Peyaud, A. Ceccucci, B. Bloch-Devaux, A. A. Maier, Andrea Bizzeti, F. Martelli, Nicolo Cartiglia, M. Veltri, S. Goy Lopez, A. Norton, Roland Winston, P. Marouelli, W. Baldini, I. Polenkevich, M. D. Wood, N. Doble, Mark Slater, F. Costantini, C. Damiani, C. Cerri, and Marco Clemencic

Subjects
semileptonic kaon decays, CKM matrix, Semileptonic decay, Particle physics, Physics and Astronomy (miscellaneous), kaon decay, BRANCHING FRACTION, Branching (polymer chemistry), NO, High Energy Physics - Experiment, mesoni K, Nuclear physics, decadimenti, MONTE-CARLO, RADIATIVE-CORRECTIONS, PHOTOS, Pi, Kaon decays, Engineering (miscellaneous), Physics, Science & Technology, Unitarity, Cabibbo–Kobayashi–Maskawa matrix, PHYSICS, PARTICLES & FIELDS, semileptonic decay, semileptonic kaon decays, CKM matrix, Physical Sciences
Abstract

Measured ratios of decay rates for Ke3/K2\pi, K\mu3/K2\pi and K\mu3/Ke3 are presented. These measurements are based on K^+- decays collected in a dedicated run in 2003 by the NA48/2 experiment at CERN. The results obtained are Ke3/K2\pi = 0.2470 +/- 0.0009 (stat) +/- 0.0004 (syst) and K\mu3/K2\pi = 0.1637 +/- 0.0006 (stat) +/- 0.0003 (syst). Using the PDG average for the K^+- -> \pi^+-\pi^0 normalisation mode, both values are found to be larger than the current values given by the Particle Data Book and lead to a larger magnitude of the |V_{us}| CKM element than previously accepted. When combined with the latest Particle Data Book value of |V_{ud}|, the result is in agreement with unitarity of the CKM matrix. In addition, a new measured value of K\mu3/Ke3 = 0.663 +/- 0.003(stat) +/- 0.001(syst) is compared to the semi-empirical predictions based on the latest form factor measurements., Comment: 20 pages, 5 tables, 10 figures. Published in European Physical Journal C 50 2 (2007), contains erratum submitted to European Physical Journal C

Published
2007

42. Search for the dark photon in π0 decays

Author

Enrico Celeghini, C. Damiani, H. D. Wahl, A. A. Maier, P. Marouelli, M. Fidecaro, E. Imbergamo, U. Moosbrugger, A. Dabrowski, B. Peyaud, M. C. Petrucci, W. Baldini, E. Monnier, G. Bocquet, V. Falaleev, M. Piccini, N. Doble, N. A. Molokanova, K. Eppard, Cristina Lazzeroni, D. Coward, I. Mannelli, L. Gatignon, M. Markytan, S. Venditti, D.J. Munday, Nicolo Cartiglia, P. L. Frabetti, V. Kekelidze, M. Scarpa, Giuseppe Ruggiero, M. Shieh, S. A. Wotton, G. Pierazzini, S. Stoynev, Milene Calvetti, A. Norton, M. Szleper, F. Marchetto, A. Michetti, A. Ceccucci, M. Pepe, G. Marel, P. Hristov, M. Veltri, Evelina Gersabeck, A. Cotta Ramusino, Maulik R. Patel, M. De Beer, Evgueni Goudzovski, S. Goy Lopez, Roland Winston, J.B. Cheze, H. Dibon, W. Kubischta, A. Gonidec, A. Winhart, T. Fonseca Martin, M. Holder, G. Collazuol, Luca Fiorini, F. Costantini, Konrad Kleinknecht, Andrea Bizzeti, R. Fantechi, P. F. Dalpiaz, M. Lenti, M. Valdata-Nappi, P. Cenci, Leander Litov, Mauro Raggi, M. Ziolkowski, G. Lamanna, S. Balev, M. Martini, J. Derre, Alan W. Walker, Roberta Arcidiacono, Marco Clemencic, E. Iacopini, E. C. Swallow, I. Polenkevich, M. D. Wood, L. Widhalm, M. Behler, Simone Bifani, Massimiliano Fiorini, M.W. Slater, A. Peters, A. Zinchenko, Cristina Biino, Ivan Mikulec, R. Wanke, J. R. Batley, Nicola Cabibbo, C. Cheshkov, V. Kozhuharov, M. Sozzi, M. Savrie, L. DiLella, B. Bloch-Devaux, G.E. Kalmus, A. Nappi, A. Gianoli, B. Vallage, M. Wache, C. Cerri, B. Renk, Yu. Potrebenikov, D. Madigozhin, P. Rubin, Manfred Jeitler, S. Giudici, G. Anzivino, E. Mazzucato, L. Masetti, F. Petrucci, C. Morales Morales, Mayda Velasco, G. Neuhofer, and D.C. Cundy

Subjects
Nuclear and High Energy Physics, Dark matter, KAON DECAYS, Socio-culturale, Astronomy & Astrophysics, 01 natural sciences, Dark photon, dark matter, High Energy Physics - Experiment, Physics, Particles & Fields, Nuclear physics, 0202 Atomic, Molecular, Nuclear, Particle And Plasma Physics, 0103 physical sciences, dark matter, meson decays, 010306 general physics, DETECTOR, Physics, Nuclear and High Energy Physics, dark photon, photon, pion, neutral pion, neutral pion, Range (particle radiation), Large Hadron Collider, Science & Technology, 010308 nuclear & particles physics, photon, Dark Photon, pion, meson decays, Nuclear & Particles Physics, lcsh:QC1-999, Physics, Nuclear, Physical Sciences, dark photon, Fotone, High Energy Physics::Experiment, Particle Physics - Experiment, lcsh:Physics
Abstract

A sample of $1.69\times 10^7$ fully reconstructed $\pi^0\to\gamma e^+e^-$ decay candidates collected by the NA48/2 experiment at CERN in 2003--2004 is analysed to search for the dark photon ($A'$) production in the $\pi^0\to\gamma A'$ decay followed by the prompt $A'\to e^+e^-$ decay. No signal is observed, and an exclusion region in the plane of the dark photon mass $m_{A'}$ and mixing parameter $\varepsilon^2$ is established. The obtained upper limits on $\varepsilon^2$ are more stringent than the previous limits in the mass range $9~{\rm MeV}/c^2, Comment: Revised version accepted for publication in Physics Letter B

Published
2015

43. The NA62 experiment at CERN: Status of the construction

Author

G. Aglieri Rinella, B. Angelucci, A. Antonelli, G. Anzivino, R. Arcidiacono, I. Azhinenko, S. Balev, J. Bendotti, A. Biagioni, C. Biino, A. Bizzeti, T. Blazek, A. Blik, B. Bloch Devaux, V. Bolotov, V. Bonaiuto, D. Britton, G. Britvich, N. Brook, F. Bucci, V. Buescher, F. Butin, E. Capitolo, C. Capoccia, V. Carassiti, N. Cartiglia, A. Cassese, A. Catinaccio, A. Cecchetti, A. Ceccucci, P. Cenci, V. Cerny, C. Cerri, O. Chikilev, R. Ciaranfi, G. Collazuol, P. Cooke, P. Cooper, G. Corradi, E. Cortina Gil, F. Costantini, A. Cotta Ramusino, D. Coward, G. D'Agostini, J. Dainton, P. Dalpiaz, H. Danielsson, J. Degrange, N. De Simone, L. DiLella, N. Dixon, N. Doble, V. Duk, V. Elsha, J. Engelfried, V. Falaleev, R. Fantechi, L. Federici, M. Fiorini, J. Fry, A. Fucci, S. Gallorini, L. Gatignon, A. Gianoli, S. Giudici, L. Glonti, A. Goncalves Martins De Oliveira, F. Gonnella, E. Goudzovski, R. Guida, E. Gushchin, F. Hahn, B. Hallgren, H. Heath, F. Herman, E. Iacopini, O. Jamet, P. Jarron, K. Kampf, J. Kaplon, V. Karjavin, V. Kekelidze, A. Khudyakov, Y.u. Kiryushin, K. Kleinknecht, A. Kluge, M. Koval, V. Kozhuharov, M. Krivda, J. Kunze, G. Lamanna, C. Lazzeroni, R. Leitner, R. Lenci, M. Lenti, E. Leonardi, P. Lichard, R. Lietava, L. Litov, D. Lomidze, A. Lonardo, N. Lurkin, D. Madigozhin, G. Maire, A. Makarov, I. Mannelli, G. Mannocchi, A. Mapelli, F. Marchetto, K. Massri, P. Matak, G. Mazza, E. Menichetti, M. Misheva, N. Molokanova, J. Morant, M. Morel, M. Moulson, S. Movchan, D. Munday, M. Napolitano, F. Newson, A. Norton, M. Noy, G. Nuessle, V. Obraztsov, S. Padolski, R. Page, T. Pak, V. Palladino, A. Pardons, E. Pedreschi, M. Pepe, F. Perez Gomez, F. Petrucci, R. Piandani, M. Piccini, J. Pinzino, M. Pivanti, I. Polenkevich, I. Popov, Y.u. Potrebenikov, D. Protopopescu, F. Raffaelli, M. Raggi, P. Riedler, A. Romano, P. Rubin, G. Ruggiero, V. Russo, V. Ryjov, A. Salamon, G. Salina, V. Samsonov, E. Santovetti, F. Sargeni, S. Schifano, V. Semenov, A. Sergi, M. Serra, S. Shkarovskiy, A. Sotnikov, V. Sougonyaev, M. Sozzi, T. Spadaro, F. Spinella, R. Staley, M. Statera, P. Sutcliffe, N. Szilasi, D. Tagnani, M. Valdata Nappi, P. Valente, V. Vassilieva, B. Velghe, M. Veltri, S. Venditti, M. Vormstein, H. Wahl, R. Wanke, P. Wertelaers, A. Winhart, R. Winston, B. Wrona, O. Yushchenko, M. Zamkovsky, A. Zinchenko, AMBROSINO, FABIO, CAPUSSELA, TIZIANA, DI FILIPPO, DOMENICO, MASSAROTTI, PAOLO, MIRRA, MARCO, SARACINO, GIULIO, G., Aglieri Rinella, Ambrosino, Fabio, B., Angelucci, A., Antonelli, G., Anzivino, R., Arcidiacono, I., Azhinenko, S., Balev, J., Bendotti, A., Biagioni, C., Biino, A., Bizzeti, T., Blazek, A., Blik, B., Bloch Devaux, V., Bolotov, V., Bonaiuto, D., Britton, G., Britvich, N., Brook, F., Bucci, V., Buescher, F., Butin, E., Capitolo, C., Capoccia, Capussela, Tiziana, V., Carassiti, N., Cartiglia, A., Cassese, A., Catinaccio, A., Cecchetti, A., Ceccucci, P., Cenci, V., Cerny, C., Cerri, O., Chikilev, R., Ciaranfi, G., Collazuol, P., Cooke, P., Cooper, G., Corradi, E., Cortina Gil, F., Costantini, A., Cotta Ramusino, D., Coward, G., D'Agostini, J., Dainton, P., Dalpiaz, H., Danielsson, J., Degrange, N., De Simone, DI FILIPPO, Domenico, L., Dilella, N., Dixon, N., Doble, V., Duk, V., Elsha, J., Engelfried, V., Falaleev, R., Fantechi, L., Federici, M., Fiorini, J., Fry, A., Fucci, S., Gallorini, L., Gatignon, A., Gianoli, S., Giudici, L., Glonti, A., Goncalves Martins De Oliveira, F., Gonnella, E., Goudzovski, R., Guida, E., Gushchin, F., Hahn, B., Hallgren, H., Heath, F., Herman, E., Iacopini, O., Jamet, P., Jarron, K., Kampf, J., Kaplon, V., Karjavin, V., Kekelidze, A., Khudyakov, Kiryushin, Y. u., K., Kleinknecht, A., Kluge, M., Koval, V., Kozhuharov, M., Krivda, J., Kunze, G., Lamanna, C., Lazzeroni, R., Leitner, R., Lenci, M., Lenti, E., Leonardi, P., Lichard, R., Lietava, L., Litov, D., Lomidze, A., Lonardo, N., Lurkin, D., Madigozhin, G., Maire, A., Makarov, I., Mannelli, G., Mannocchi, A., Mapelli, F., Marchetto, Massarotti, Paolo, K., Massri, P., Matak, G., Mazza, E., Menichetti, Mirra, Marco, M., Misheva, N., Molokanova, J., Morant, M., Morel, M., Moulson, S., Movchan, D., Munday, M., Napolitano, F., Newson, A., Norton, M., Noy, G., Nuessle, V., Obraztsov, S., Padolski, R., Page, T., Pak, V., Palladino, A., Pardon, E., Pedreschi, M., Pepe, F., Perez Gomez, F., Petrucci, R., Piandani, M., Piccini, J., Pinzino, M., Pivanti, I., Polenkevich, I., Popov, Potrebenikov, Y. u., D., Protopopescu, F., Raffaelli, M., Raggi, P., Riedler, A., Romano, P., Rubin, G., Ruggiero, V., Russo, V., Ryjov, A., Salamon, G., Salina, V., Samsonov, E., Santovetti, Saracino, Giulio, F., Sargeni, S., Schifano, V., Semenov, A., Sergi, M., Serra, S., Shkarovskiy, A., Sotnikov, V., Sougonyaev, M., Sozzi, T., Spadaro, F., Spinella, R., Staley, M., Statera, P., Sutcliffe, N., Szilasi, D., Tagnani, M., Valdata Nappi, P., Valente, V., Vassilieva, B., Velghe, M., Veltri, S., Venditti, M., Vormstein, H., Wahl, R., Wanke, P., Wertelaer, A., Winhart, R., Winston, B., Wrona, O., Yushchenko, M., Zamkovsky, and A., Zinchenko

Published
2013

44. Rare K decays: Present and perspectives with NA62

Author

G. Aglieri Rinella, R. Aliberti, B. Angelucci, A. Antonelli, G. Anzivino, R. Arcidiacono, I. Azhinenko, S. Balev, J. Bendotti, A. Biagioni, C. Biino, A. Bizzeti, T. Blazek, A. Blik, B. Bloch Devaux, V. Bolotov, V. Bonaiuto, M. Bragadireanu, D. Britton, G. Britvich, N. Brook, F. Bucci, V. Buescher, F. Butin, E. Capitolo, C. Capoccia, V. Carassiti, N. Cartiglia, A. Cassese, A. Catinaccio, A. Cecchetti, A. Ceccucci, P. Cenci, V. Cerny, C. Cerri, O. Chikilev, R. Ciaranfi, G. Collazuol, P. Cooke, P. Cooper, G. Corradi, E. Cortina Gil, F. Costantini, A. Cotta Ramusino, D. Coward, G. D???Agostini, J. Dain ton, P. Dalpiaz, H. Danielsson, J. Degrange, N. De Simone, L. Di Lella, N. Dixon, N. Doble, V. Duk, V. Elsha, J. Engelfried, T. Enik, V. Falaleev, R. Fantechi, L. Federici, M. Fiorini, J. Fry, A. Fucci, L. Fulton, S. Gallorini, L. Gatignon, A. Gianoli, S. Giudici, L. Glonti, A. Goncalves Martins, F. Gonnella, E. Goudzovski, R. Guida, E. Gushchin, F. Hahn, B. Hallgren, H. Heath, F. Herman, D. Hutchcroft, E. Ia copini, O. Jamet, P. Jarron, K. Kampf, J. Kaplon, V. Karjavin, V. Kekelidze, S. Kholodenko, G. Khoriauli, A. Khudyakov, Y.u. Kiryushin, K. Kleinknecht, A. Kluge, M. Koval, V. Kozhuharov, M. Krivda, Y. Kudenko, J. Kunze, G. Lamanna, C. Lazzeroni, R. Leitner, R. Lenci, M. Lenti, E. Leonardi, P. Lichard, R. Lietava, L. Litov, D. Lomidze, A. Lonardo, N. Lurkin, D. Madigozhin, G. Maire, A. Makarov, I. Mannelli, G. Man nocchi, A. Mapelli, F. Marchetto, K. Massri, P. Matak, G. Mazza, E. Menichetti, M. Misheva, N. Molokanova, J. Morant, M. Morel, M. Moulson, S. Movchan, D. Munday, M. Napolitano, F. Newson, A. Norton, M. Noy, G. Nuessle, V. Obraztsov, S. Padolski, R. Page, V. Palladino, A. Pardons, E. Pedreschi, M. Pepe, F. Perez Gomez, M. Perrin Terrin, P. Petrov, F. Petrucci, R. Piandani, M. Pic cini, D. Pietreanu, J. Pinzino, M. Pivanti, I. Polenkevich, I. Popov, Y.u. Potrebenikov, D. Protopopescu, F. Raffaelli, M. Raggi, P. Riedler, A. Romano, P. Rubin, G. Ruggiero, V. Russo, V. Ryjov, A. Salamon, G. Salina, V. Samsonov, E. Santovetti, F. Sargeni, S. Schifano, V. Semenov, A. Sergi, M. Serra, S. Shkarovskiy, A. Sotnikov, V. Sougonyaev, M. Sozzi, T. Spadaro, F. Spinella, R. Staley, M. Statera, P. Sutcliffe, N. Szilasi, D. Tagnani, M. Valdata Nappi, P. Valente, M. Vasile, V. Vassilieva, B. Velghe, M. Veltri, S. Venditti, M. Vormstein, H. Wahl, R. Wanke, P. Wertelaers, A. Winhart, R. Winston, B. Wrona, O. Yushchenko, M. Zamkovsky, A. Zinchenko, AMBROSINO, FABIO, CAPUSSELA, TIZIANA, DI FILIPPO, DOMENICO, MASSAROTTI, PAOLO, MIRRA, MARCO, SARACINO, GIULIO, G., Aglieri Rinella, R., Aliberti, Ambrosino, Fabio, B., Angelucci, A., Antonelli, G., Anzivino, R., Arcidiacono, I., Azhinenko, S., Balev, J., Bendotti, A., Biagioni, C., Biino, A., Bizzeti, T., Blazek, A., Blik, B., Bloch Devaux, V., Bolotov, V., Bonaiuto, M., Bragadireanu, D., Britton, G., Britvich, N., Brook, F., Bucci, V., Buescher, F., Butin, E., Capitolo, C., Capoccia, Capussela, Tiziana, V., Carassiti, N., Cartiglia, A., Cassese, A., Catinaccio, A., Cecchetti, A., Ceccucci, P., Cenci, V., Cerny, C., Cerri, O., Chikilev, R., Ciaranfi, G., Collazuol, P., Cooke, P., Cooper, G., Corradi, E., Cortina Gil, F., Costantini, A., Cotta Ramusino, D., Coward, G., D???agostini, J., Dain ton, P., Dalpiaz, H., Danielsson, J., Degrange, N., De Simone, DI FILIPPO, Domenico, L., Di Lella, N., Dixon, N., Doble, V., Duk, V., Elsha, J., Engelfried, T., Enik, V., Falaleev, R., Fantechi, L., Federici, M., Fiorini, J., Fry, A., Fucci, L., Fulton, S., Gallorini, L., Gatignon, A., Gianoli, S., Giudici, L., Glonti, A., Goncalves Martin, F., Gonnella, E., Goudzovski, R., Guida, E., Gushchin, F., Hahn, B., Hallgren, H., Heath, F., Herman, D., Hutchcroft, E., Ia copini, O., Jamet, P., Jarron, K., Kampf, J., Kaplon, V., Karjavin, V., Kekelidze, S., Kholodenko, G., Khoriauli, A., Khudyakov, Kiryushin, Y. u., K., Kleinknecht, A., Kluge, M., Koval, V., Kozhuharov, M., Krivda, Y., Kudenko, J., Kunze, G., Lamanna, C., Lazzeroni, R., Leitner, R., Lenci, M., Lenti, E., Leonardi, P., Lichard, R., Lietava, L., Litov, D., Lomidze, A., Lonardo, N., Lurkin, D., Madigozhin, G., Maire, A., Makarov, I., Mannelli, G., Man nocchi, A., Mapelli, F., Marchetto, Massarotti, Paolo, K., Massri, P., Matak, G., Mazza, E., Menichetti, Mirra, Marco, M., Misheva, N., Molokanova, J., Morant, M., Morel, M., Moulson, S., Movchan, D., Munday, M., Napolitano, F., Newson, A., Norton, M., Noy, G., Nuessle, V., Obraztsov, S., Padolski, R., Page, V., Palladino, A., Pardon, E., Pedreschi, M., Pepe, F., Perez Gomez, M., Perrin Terrin, P., Petrov, F., Petrucci, R., Piandani, M., Pic cini, D., Pietreanu, J., Pinzino, M., Pivanti, I., Polenkevich, I., Popov, Potrebenikov, Y. u., D., Protopopescu, F., Raffaelli, M., Raggi, P., Riedler, A., Romano, P., Rubin, G., Ruggiero, V., Russo, V., Ryjov, A., Salamon, G., Salina, V., Samsonov, E., Santovetti, Saracino, Giulio, F., Sargeni, S., Schifano, V., Semenov, A., Sergi, M., Serra, S., Shkarovskiy, A., Sotnikov, V., Sougonyaev, M., Sozzi, T., Spadaro, F., Spinella, R., Staley, M., Statera, P., Sutcliffe, N., Szilasi, D., Tagnani, M., Valdata Nappi, P., Valente, M., Vasile, V., Vassilieva, B., Velghe, M., Veltri, S., Venditti, M., Vormstein, H., Wahl, R., Wanke, P., Wertelaer, A., Winhart, R., Winston, B., Wrona, O., Yushchenko, M., Zamkovsky, and A., Zinchenko

Published
2013

45. The NA62 experiment: Prospects for the K+ -> pi+nu nu bar measurement

Author

G. Aglieri Rinella, B. Angelucci, A. Antonelli, G. Anzivino, R. Arcidiacono, I. Azhinenko, S. Balev, A. Biagioni, C. Biino, A. Bizzeti, T. Blazek, A. Blik, B. Bloch Devaux, V. Bolotov, V. Bonaiuto, D. Britton, G. Britvich, N. Brook, F. Bucci, V. Buescher, F. Butin, V. Carassiti, N. Car tiglia, A. Cassese, A. Catinaccio, A. Ceccucci, P. Cenci, V. Cerny, C. Cerri, O. Chikilev, R. Ciaranfi, G. Collazuol, P. Cooke, P. Cooper, E. Cortina Gil, F. Costantini, A. Cotta Ramusino, D. Coward, G. D???Agostini, J. Dainton, P. Dalpiaz, H. Danielsson, N. De Simone, L. Di Lella, N. Doble, V. Duk, V. Elsha, J. Engelfried, V. Falaleev, R. Fan techi, L. Federici, M. Fiorini, J. Fry, A. Fucci, S. Gallorini, L. Gatignon, A. Gianoli, S. Giudici, L. Glonti, F. Gonnella, E. Goudzovski, R. Guida, E. Gushchin, F. Hahn, B. Hallgren, H. Heath, F. Herman, E. Iacopini, O. Jamet, P. Jarron, K. Kampf, J. Kaplon, V. Karjavin, V. Kekelidze, A. Khudyakov, Y.u. Kiryushin, K. Kleinknecht, A. Kluge, M. Koval, V. Kozhuharov, M. Krivda, J. Kunze, G. Lamanna, C. Lazzeroni, R. Leitner, M. Lenti, E. Leonardi, P. Lichard, R. Lietava, L. Litov, D. Lomidze, A. Lonardo, N. Lurkin, D. Madigozhin, G. Maire, A. Makarov, I. Mannelli, G. Man nocchi, A. Mapelli, F. Marchetto, K. Massri, P. Matak, G. Mazza, E. Menichetti, M. Misheva, N. Molokanova, M. Morel, M. Moulson, S. Movchan, D. Munday, M. Napolitano, F. Newson, A. Norton, M. Noy, G. Nuessle, V. Obraztsov, S. Padolski, R. Page, T. Pak, V. Palladino, A. Pardons, E. Pedreschi, M. Pepe, F. Petrucci, R. Piandani, M. Piccini, J. Pinzino, M. Pivanti, I. Polenkevich, I. Popov, Y.u. Potrebenikov, D. Protopopescu, F. Raffaelli, M. Raggi, P. Riedler, A. Romano, P. Rubin, G. Ruggiero, V. Ryjov, A. Salamon, G. Salina, V. Samsonov, E. Santovetti, F. Sargeni, S. Schifano, V. Semenov, A. Sergi, M. Serra, S. Shkarovskiy, A. Sotnikov, V. Sougonyaev, M. Sozzi, T. Spadaro, F. Spinella, R. Staley, M. Statera, P. Sutcliffe, N. Szilasi, M. Valdata Nappi, P. Valente, B. Vel ghe, M. Veltri, S. Venditti, M. Vormstein, H. Wahl, R. Wanke, P. Wertelaers, A. Winhart, R. Winston, B. Wrona, O. Yushchenko, M. Zamkovsky, A. Zinchenko, AMBROSINO, FABIO, CAPUSSELA, TIZIANA, DI FILIPPO, DOMENICO, MASSAROTTI, PAOLO, MIRRA, MARCO, SARACINO, GIULIO, G., Aglieri Rinella, Ambrosino, Fabio, B., Angelucci, A., Antonelli, G., Anzivino, R., Arcidiacono, I., Azhinenko, S., Balev, A., Biagioni, C., Biino, A., Bizzeti, T., Blazek, A., Blik, B., Bloch Devaux, V., Bolotov, V., Bonaiuto, D., Britton, G., Britvich, N., Brook, F., Bucci, V., Buescher, F., Butin, Capussela, Tiziana, V., Carassiti, N., Car tiglia, A., Cassese, A., Catinaccio, A., Ceccucci, P., Cenci, V., Cerny, C., Cerri, O., Chikilev, R., Ciaranfi, G., Collazuol, P., Cooke, P., Cooper, E., Cortina Gil, F., Costantini, A., Cotta Ramusino, D., Coward, G., D???agostini, J., Dainton, P., Dalpiaz, H., Danielsson, N., De Simone, DI FILIPPO, Domenico, L., Di Lella, N., Doble, V., Duk, V., Elsha, J., Engelfried, V., Falaleev, R., Fan techi, L., Federici, M., Fiorini, J., Fry, A., Fucci, S., Gallorini, L., Gatignon, A., Gianoli, S., Giudici, L., Glonti, F., Gonnella, E., Goudzovski, R., Guida, E., Gushchin, F., Hahn, B., Hallgren, H., Heath, F., Herman, E., Iacopini, O., Jamet, P., Jarron, K., Kampf, J., Kaplon, V., Karjavin, V., Kekelidze, A., Khudyakov, Kiryushin, Y. u., K., Kleinknecht, A., Kluge, M., Koval, V., Kozhuharov, M., Krivda, J., Kunze, G., Lamanna, C., Lazzeroni, R., Leitner, M., Lenti, E., Leonardi, P., Lichard, R., Lietava, L., Litov, D., Lomidze, A., Lonardo, N., Lurkin, D., Madigozhin, G., Maire, A., Makarov, I., Mannelli, G., Man nocchi, A., Mapelli, F., Marchetto, Massarotti, Paolo, K., Massri, P., Matak, G., Mazza, E., Menichetti, Mirra, Marco, M., Misheva, N., Molokanova, M., Morel, M., Moulson, S., Movchan, D., Munday, M., Napolitano, F., Newson, A., Norton, M., Noy, G., Nuessle, V., Obraztsov, S., Padolski, R., Page, T., Pak, V., Palladino, A., Pardon, E., Pedreschi, M., Pepe, F., Petrucci, R., Piandani, M., Piccini, J., Pinzino, M., Pivanti, I., Polenkevich, I., Popov, Potrebenikov, Y. u., D., Protopopescu, F., Raffaelli, M., Raggi, P., Riedler, A., Romano, P., Rubin, G., Ruggiero, V., Ryjov, A., Salamon, G., Salina, V., Samsonov, E., Santovetti, Saracino, Giulio, F., Sargeni, S., Schifano, V., Semenov, A., Sergi, M., Serra, S., Shkarovskiy, A., Sotnikov, V., Sougonyaev, M., Sozzi, T., Spadaro, F., Spinella, R., Staley, M., Statera, P., Sutcliffe, N., Szilasi, M., Valdata Nappi, P., Valente, B., Vel ghe, M., Veltri, S., Venditti, M., Vormstein, H., Wahl, R., Wanke, P., Wertelaer, A., Winhart, R., Winston, B., Wrona, O., Yushchenko, M., Zamkovsky, and A., Zinchenko

Published
2013

46. Study of the rare decay K± pi ± gg

Author

AMBROSINO, FABIO, DI FILIPPO, DOMENICO, MASSAROTTI, PAOLO, SARACINO, GIULIO, A. Antonelli, G. Anzivino, R. Arcidiacono, W. Baldini, S. Balev, S. Bifani, C. Biino, A. Bizzeti, B. Bloch Devaux, V. Bolotov, F. Bucci, A. Ceccucci, P. Cenci, C. Cerri, G. Collazuol, F. Costantini, A. Cotta Ramusino, D. Coward, G. D???Agostini, P. Dalpiaz, H. Danielsson, G. Dellacasa, L. DiLella, N. Doble, V. Duk, J. En gelfried, K. Eppard, V. Falaleev, R. Fantechi, M. Fiorini, P. L. Frabetti, A. Fucci, S. Gallorini, L. Gatignon, E. Gersabeck, A. Gianoli, S. Giudici, E. Goudzovski, S. Goy Lopez, E. Gushchin, B. Hallgren, M. Hita Hochgesand, E. Iacopini, E. Imbergamo, V. Kekelidze, K. Kleinknecht, V. Kozhuharov, V. Kurshetsov, G. Lamanna, C. Lazzeroni, M. Lenti, E. Leonardi, L. Litov, D. Madigozhin, A. Maier, I. Mannelli, F. Marchetto, M. Misheva, N. Molokanova, M. Moulson, S. Movchan, M. Napolitano, A. Norton, T. Numao, V. Obraztsov, V. Palladino, M. Pepe, A. Peters, F. Petrucci, B. Peyaud, R. Piandani, M. Piccini, G. Pierazzini, I. Popov, Y.u. Potrebenikov, M. Raggi, B. Renk, F. Retière, P. Riedler, A. Romano, P. Rubin, G. Ruggiero, A. Salamon, M. Savrié, V. Semenov, A. Sergi, M. Serra, S. Shkarovskiy, M. Sozzi, T. Spadaro, P. Valente, M. Veltri, S. Venditti, H. Wahl, R. Wanke, A. Winhart, R. Winston, O. Yushchenko, A. Zinchenko, Ambrosino, Fabio, A., Antonelli, G., Anzivino, R., Arcidiacono, W., Baldini, S., Balev, S., Bifani, C., Biino, A., Bizzeti, B., Bloch Devaux, V., Bolotov, F., Bucci, A., Ceccucci, P., Cenci, C., Cerri, G., Collazuol, F., Costantini, A., Cotta Ramusino, D., Coward, G., D???agostini, P., Dalpiaz, H., Danielsson, G., Dellacasa, DI FILIPPO, Domenico, L., Dilella, N., Doble, V., Duk, J., En gelfried, K., Eppard, V., Falaleev, R., Fantechi, M., Fiorini, P. L., Frabetti, A., Fucci, S., Gallorini, L., Gatignon, E., Gersabeck, A., Gianoli, S., Giudici, E., Goudzovski, S., Goy Lopez, E., Gushchin, B., Hallgren, M., Hita Hochgesand, E., Iacopini, E., Imbergamo, V., Kekelidze, K., Kleinknecht, V., Kozhuharov, V., Kurshetsov, G., Lamanna, C., Lazzeroni, M., Lenti, E., Leonardi, L., Litov, D., Madigozhin, A., Maier, I., Mannelli, F., Marchetto, Massarotti, Paolo, M., Misheva, N., Molokanova, M., Moulson, S., Movchan, M., Napolitano, A., Norton, T., Numao, V., Obraztsov, V., Palladino, M., Pepe, A., Peter, F., Petrucci, B., Peyaud, R., Piandani, M., Piccini, G., Pierazzini, I., Popov, Potrebenikov, Y. u., M., Raggi, B., Renk, F., Retière, P., Riedler, A., Romano, P., Rubin, G., Ruggiero, A., Salamon, Saracino, Giulio, M., Savrié, V., Semenov, A., Sergi, M., Serra, S., Shkarovskiy, M., Sozzi, T., Spadaro, P., Valente, M., Veltri, S., Venditti, H., Wahl, R., Wanke, A., Winhart, R., Winston, O., Yushchenko, and A., Zinchenko

Published
2013

47. Precision measurement of the ratio of the charged kaon leptonic decay rates

Author

O. Yushchenko, P. Valente, V. Kurshetsov, H. O. Danielsson, Roberta Arcidiacono, P. L. Frabetti, Viacheslav Duk, E. Gushchin, Emilio Leonardi, T. Numao, M. Serra, Massimiliano Fiorini, S. Gallorini, M. Moulson, M. Veltri, P. F. Dalpiaz, F. Marchetto, B. Renk, V. Kekelidze, Roland Winston, A. Zinchenko, Konrad Kleinknecht, R. Wanke, S. Movchan, Andrea Bizzeti, S. Giudici, Antonino Sergi, Mauro Raggi, S. Goy Lopez, F. Ambrosino, M. Lenti, D. Coward, M. Pepe, M. Savrie, P. Rubin, A. Peters, S. Shkarovskiy, Leander Litov, A. Winhart, B. Bloch-Devaux, G. D'Agostini, E. Iacopini, Cristina Biino, Paolo Massarotti, W. Baldini, V. Palladino, Jürgen Engelfried, G. Lamanna, A. Gianoli, G. Dellacasa, S. Venditti, M. Misheva, T. Spadaro, Giuseppe Ruggiero, M. Hita-Hochgesand, A. Salamon, B. Hallgren, V. Falaleev, I. Mannelli, L. Gatignon, D. Madigozhin, B. Peyaud, Yu. Potrebenikov, F. Costantini, Petra Riedler, V. Obraztsov, I. Popov, A. Fucci, F. Retiere, Evgueni Goudzovski, G. Pierazzini, A. Romano, G. Collazuol, Simone Bifani, F. Petrucci, V K Semenov, Roberto Piandani, A. Norton, M. Piccini, R. Fantechi, N. Doble, A. Cotta Ramusino, D. Di Filippo, V. Bolotov, S. Balev, M. Sozzi, L. DiLella, A. A. Maier, E. Imbergamo, F. Bucci, Cristina Lazzeroni, A. Antonelli, V. Kozhuharov, C. Cerri, G. Saracino, G. Anzivino, N. A. Molokanova, K. Eppard, M. Napolitano, A. Ceccucci, Evelina Gersabeck, P. Cenci, C., Lazzeroni, A., Romano, A., Ceccucci, H., Danielsson, V., Falaleev, L., Gatignon, S., Goy Lopez, B., Hallgren, A., Maier, A., Peter, M., Piccini, P., Riedler, P. L., Frabetti, E., Gersabeck, V., Kekelidze, D., Madigozhin, M., Misheva, N., Molokanova, S., Movchan, Potrebenikov, Y. u., S., Shkarovskiy, A., Zinchenko, P., Rubin, W., Baldini, A., Cotta Ramusino, P., Dalpiaz, M., Fiorini, A., Gianoli, A., Norton, F., Petrucci, M., Savri?, A., Bizzeti, F., Bucci, E., Iacopini, M., Lenti, M., Veltri, A., Antonelli, M., Moulson, M., Raggi, T., Spadaro, K., Eppard, M., Hita Hochgesand, K., Kleinknecht, B., Renk, R., Wanke, A., Winhart, R., Winston, V., Bolotov, V., Duk, E., Gushchin, Ambrosino, Fabio, DI FILIPPO, Domenico, Massarotti, Paolo, Napolitano, Marco, Palladino, Vito, Saracino, Giulio, G., Anzivino, E., Imbergamo, R., Piandani, A., Sergi, P., Cenci, M., Pepe, F., Costantini, N., Doble, S., Giudici, G., Pierazzini, M., Sozzi, S., Venditti, S., Balev, G., Collazuol, L., Dilella, S., Gallorini, E., Goudzovski, G., Lamanna, I., Mannelli, G., Ruggiero, C., Cerri, R., Fantechi, V., Kurshetsov, V., Obraztsov, I., Popov, V., Semenov, O., Yushchenko, G., D?agostini, E., Leonardi, M., Serra, P., Valente, A., Fucci, A., Salamon, B., Bloch Devaux, B., Peyaud, J., Engelfried, D., Coward, V., Kozhuharov, L., Litov, R., Arcidiacono, S., Bifani, C., Biino, G., Dellacasa, F., Marchetto, T., Numao, and F., Reti?re

Subjects
Nuclear and High Energy Physics, Particle physics, standard model, FOS: Physical sciences, NA62 experiment, 01 natural sciences, High Energy Physics - Experiment, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), lepton universality, Rare kaon decays, chiral perturbation theory, Lepton universality, Charged Kaon Decay, 0103 physical sciences, kaon decays, leptonic decays, lepton universality, 010306 general physics, Physics, leptonic decays, Large Hadron Collider, kaon decays, 010308 nuclear & particles physics, charged kaon, 3. Good health, Kaon rare decays, Full data, branching ratio, Particle Physics - Experiment
Abstract

A precision measurement of the ratio RK of the rates of kaon leptonic decays K+- --> e nu and K+- --> mu nu with the full data sample collected by the NA62 experiment at CERN in 2007-2008 is reported. The result, obtained by analysing ~150000 reconstructed K+- --> e nu candidates with 11% background contamination, is RK = (2.488+-0.010)*10^{-5}, in agreement with the Standard Model expectation., Accepted for publication in Physics Letters B (18 January 2013). 18 pages, 6 figures

Published
2013

48. NICA PROJECT AT JINR

Author

R. Lednicky, Grigory Trubnikov, V. Kekelidze, Igor Meshkov, Viktor Matveev, and Alexander Sorin

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Nuclotron, Radiation, Luminosity (scattering theory), Kinetic energy, Atomic and Molecular Physics, and Optics, law.invention, Ion, Nuclear physics, Baryon, Deuterium, law, Physics::Accelerator Physics, Radiology, Nuclear Medicine and imaging, Nuclear Experiment, Collider, Energy (signal processing)
Abstract

The project of Nuclotron-based Ion Collider fAcility (NICA) is under development at JINR (Dubna). The general goals of the project are providing of colliding beams for experimental studies of both hot and dense strongly interacting baryonic matter and spin physics (in collisions of polarized protons and deuterons). The first program requires running of heavy ion mode in the energy range of \(\sqrt{s_{NN}}\) = 4–11 GeV at average luminosity of \(\textit{L} = 1 \cdot 10^{27}\) cm\(^{-2}\)s\(^{-1}\) for \(^{197}\)Au\(^{79+}\) nuclei. This stage of the project will be preceded with fixed target experiments on heavy ion beam extracted from Nuclotron at kinetic energy up to 4.5 GeV / u. The polarized beams mode is proposed to be used in energy range of \(\sqrt{s_{NN}}\) = 12–27 GeV (protons) at luminosity up to \(1 \cdot 10^{32}\) cm\(^{-2}\)s\(^{-1}\). The report contains a brief description of the facility scheme and characteristics in heavy ion operation mode, the description of the MultiPurpose Detector (MPD) and characteristics of the reactions of the colliding ions, which allow us to detect the mixed phase formation. Status and plans of the project development are presented.

Published
2015

49. Status of the NICA project at JINR

Author

Igor Meshkov, Grigory Trubnikov, Rihard Lednicky, Alexandr Sorin, V. Kekelidze, Alexandr Kovalenko, and Viktor Matveev

Subjects
Nuclear and High Energy Physics, Particle physics, spin physics research, Physics::Instrumentation and Detectors, QC1-999, Nuclear Theory, heavy-ion interactions, Nucleon spin structure, Spin structure, fixed target and collider experiments, 01 natural sciences, law.invention, Ion, Nuclear physics, law, 0103 physical sciences, heavy ion interactions, 010306 general physics, Collider, Nuclear Experiment, Physics, Nuclotron, Luminosity (scattering theory), baryonic matter, 010308 nuclear & particles physics, Baryon, Deuterium, Physics::Accelerator Physics, High Energy Physics::Experiment, Nucleon
Abstract

The NICA (Nuclotron-based Ion Collider fAcility) project is now under active realization at the Joint Institute for Nuclear Research (JINR, Dubna). The main goal of the project is a study of hot and dense strongly interacting matter in heavy ion (up to Au) collisions at the centre-of-mass energies up to 11 GeV per nucleon. Two modes of operation are foreseen, collider mode and extracted beams, with two detectors: MPD and BM@N. The both experiments are in preparation stage. An average luminosity in the collider mode is expected as 10E27 cm-2 s-1 for Au (79+). Extracted beams of various nucleus species with maximum momenta of 13 GeV/c (for protons) will be available. A study of spin physics with extracted and colliding beams of polarized deuterons and protons at the energies up to 27 GeV (for protons) is foreseen with the NICA facility. The proposed program allows one to search for possible signs of phase transitions and critical phenomena as well as to shed light on the problem of thenucleon spin structure.

Published
2015

50. Observation of a cusp-like structure in the π0π0 invariant mass distribution from K±→π±π0π0 decay and determination of the ππ scattering lengths

Author

J.R. Batley, C. Lazzeroni, D.J. Munday, M.W. Slater, S.A. Wotton, R. Arcidiacono, G. Bocquet, N. Cabibbo, A. Ceccucci, D. Cundy, V. Falaleev, M. Fidecaro, L. Gatignon, A. Gonidec, W. Kubischta, A. Norton, M. Patel, A. Peters, S. Balev, P.L. Frabetti, E. Goudzovski, P. Hristov, V. Kekelidze, V. Kozhuharov, L. Litov, D. Madigozhin, E. Marinova, N. Molokanova, I. Polenkevich, Yu. Potrebenikov, S. Stoynev, A. Zinchenko, E. Monnier, E. Swallow, R. Winston, P. Rubin, A. Walker, W. Baldini, A. Cotta Ramusino, P. Dalpiaz, C. Damiani, M. Fiorini, A. Gianoli, M. Martini, F. Petrucci, M. Savrié, M. Scarpa, H. Wahl, A. Bizzeti, M. Calvetti, E. Celeghini, E. Iacopini, M. Lenti, F. Martelli, G. Ruggiero, M. Veltri, M. Behler, K. Eppard, K. Kleinknecht, P. Marouelli, L. Masetti, U. Moosbrugger, C. Morales Morales, B. Renk, M. Wache, R. Wanke, A. Winhart, D. Coward, A. Dabrowski, T. Fonseca Martin, M. Shieh, M. Szleper, M. Velasco, M.D. Wood, G. Anzivino, P. Cenci, E. Imbergamo, M. Pepe, M.C. Petrucci, M. Piccini, M. Raggi, M. Valdata-Nappi, C. Cerri, G. Collazuol, F. Costantini, L. DiLella, N. Doble, R. Fantechi, L. Fiorini, S. Giudici, G. Lamanna, I. Mannelli, A. Michetti, G. Pierazzini, M. Sozzi, B. Bloch-Devaux, C. Cheshkov, J.B. Chèze, M. De Beer, J. Derré, G. Marel, E. Mazzucato, B. Peyaud, B. Vallage, M. Holder, A. Maier, M. Ziolkowski, S. Bifani, C. Biino, N. Cartiglia, M. Clemencic, S. Goy Lopez, F. Marchetto, H. Dibon, M. Jeitler, M. Markytan, I. Mikulec, G. Neuhofer, and L. Widhalm

Subjects
Cusp (singularity), Physics, Nuclear and High Energy Physics, Particle physics, Pion, Distribution (mathematics), Scattering, Isospin, Pi, Invariant mass, Anomaly (physics)
Abstract

We report the results from a study of ~23 Million K+- ==> pi+- pizero pizero decays recorded by the NA48/2 experiment at the CERN SPS, showing an anomaly in the pizero pizero invariant mass distribution in the region around 2m+, where m+ is the charged pion mass. This anomaly, never observed in previous experiments, can be interpreted as an effect due mainly to the final state charge exchange scattering process pi+ pi- ==> pizero pizero in K+- ==> pi+- pi+ pi- decay. It provides a precise determination of a0 - a2, the difference between the pi-pi scattering lengths in the isospin I=0 and I=2 states.

Published
2006

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