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1. 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

2. Measurement of the branching ratio of the decay and extraction of the CKM parameter

Author

A. Lai, D. Marras, A. Bevan, R.S. Dosanjh, T.J. Gershon, B. Hay, G.E. Kalmus, C. Lazzeroni, D.J. Munday, 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, A. Norton, S. Palestini, B. Panzer-Steindel, H. Taureg, M. Velasco, H. Wahl, C. Cheshkov, A. Gaponenko, P. Hristov, V. Kekelidze, L. Litov, D. Madigojine, N. Molokanova, Yu. Potrebenikov, S. Stoynev, G. Tatishvili, A. Tkatchev, 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. Lenti, F. Martelli, M. Veltri, H.G. Becker, K. Eppard, M. Eppard, H. Fox, A. Kalter, K. Kleinknecht, U. Koch, L. Köpke, P. Lopes da Silva, P. Marouelli, 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. Casali, C. Cerri, M. Cirilli, F. Costantini, R. Fantechi, L. Fiorini, S. Giudici, G. Lamanna, 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, R. Guida, F. Marchetto, E. Menichetti, N. Pastrone, J. Nassalski, E. Rondio, M. Szleper, W. Wislicki, S. Wronka, H. Dibon, G. Fischer, M. Jeitler, M. Markytan, I. Mikulec, G. Neuhofer, M. Pernicka, A. Taurok, and L. Widhalm

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Cabibbo–Kobayashi–Maskawa matrix, Branching fraction, Coupling parameter, Extraction (chemistry), Form factor (quantum field theory), Measure (mathematics)
Abstract

We present a new measurement of the branching ratio R of the decay K L → π ± e ∓ ν , denoted as K e 3 , relative to all charged K L decays with two tracks, based on data taken with the NA48 detector at the CERN SPS. We measure R = 0.4978 ± 0.0035 . From this we derive the K e 3 branching fraction and the weak coupling parameter | V u s | in the CKM matrix. We obtain | V u s | f + ( 0 ) = 0.2146 ± 0.0016 , where f + ( 0 ) is the vector form factor in the K e 3 decay.

Published
2004

3. Performance of the liquid argon electromagnetic and hadronic accordion calorimeter for the LHC

Author

C.W. Fabjan, R. Nacash, J-P. Meyer, Peter Jenni, D. Stephani, Howard Gordon, J. Colas, Marzio Nessi, Edouard Boos, Johann Collot, C. Padilla, F. Manfredi, L. Owe Eek, P. de Saintignon, Miriam Lucio Martinez, T. Leflour, B. Beaugiraud, O. Gildemeister, V. Speziali, G. Gaidos, J.C. Chollet, Georges Azuelos, A. Astbury, Laura Perini, F. Etienne, J. Schwindling, M. Stipcevic, P. Lavocat, J. Pouxe, R. Zitoun, R. Chase, F. Gianotti, Daniel Fournier, Bengt Lund-Jensen, Elemer Nagy, E.I. Florian, D.V. Camin, E. Merchez, J. P. Repellin, Arthur Schaffer, Richard Keeler, Paola Sala, A. Hirosoho, Donatella Cavalli, J. F. Renardy, B. Merkel, Andrea Ferrari, G. Laborie, A. Cravero, Luc Poggioli, Gilles Beaudoin, J. Soderqvist, G. Hansl-Kozanecka, A. Bazan, B.O. Schaoutnikov, D. Dzahini, Valerio Re, Luis Hervas, Veljko Radeka, Guillaume Unal, J. S. White, Isabelle Wingerter-Seez, J.M. Noppe, Laurent Serin, P. Kitching, Claude Leroy, Fernando Barreiro, S. Basa, L. Gosset, B. Olsen, J. Lory, D. Imbault, J.P. Lottin, J. Roy, Pierre Petroff, B. Aubert, J.M. Baze, Lydia Iconomidou-Fayard, M. Mazzanti, Emmanuel Monnier, W. Richtel, V. Vuillemin, L. Mandelli, Sylvain Tisserant, A. Checktman, E. Auge, M. Chemeissiani, M. C. Cousinou, L. Cozzi, Giuseppe Costa, P. Depommier, Louis Fayard, Ph. Jean, P. Dargent, D.C. Rahm, Y. Zolnierowski, D. Fouchez, Doug Gingrich, C. Olivetto, N. L. Rodning, J.L. Chevalley, G. Battistoni, G. Parrour, C. De La Taille, James Pinfold, Bruno Mansoulie, Nicolas Seguin, M. Marie, D. Canton, H. Zaccone, G. Mahout, L. Labarga, J. Teiger, Ll. Garrido, M. Lefebvre, J. C. Clemens, G. Greenious, E. Fernandez, D. Sauvage, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Large Hadron Collider, Calorimeter (particle physics), Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Nuclear Theory, Detector, Hadron, Electron, liquid argon, hadronic calorimeter, accordion, 01 natural sciences, Accordion, Nuclear physics, Pion, 0103 physical sciences, High Energy Physics::Experiment, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment, 010306 general physics, Instrumentation
Abstract

A large scale prototype of a liquid argon accordion calorimeter, conceived as a sector of a full LHC Barrel detector and consisting of an electromagnetic and a hadronic section, has been constructed and tested at the CERN SPS with electron and pion beams in the energy range 10-287 GeV. The energy resolution measured for electrons is 10%/square-root E[GeV] with a local constant of 0.2%. Preliminary results on the hadronic section, which for this first exposure had only half of its transverse coverage, look encouraging and show that the calorimeter behaves according to the design figures.

Published
1994

4. Performance of a liquid argon preshower detector integrated with an Accordion calorimeter

Author

F. Gianotti, J. Soderqvist, Isabelle Wingerter-Seez, R. Chase, P. Lavocat, C.W. Fabjan, Y. Zolnierowski, Peter Jenni, J.P. Lottin, B. Aubert, W. Richter, J. F. Renardy, B. Merkel, Andrea Ferrari, J.P. Vialle, B. Beaugiraud, M. Pepe, O. Gildemeister, D.V. Camin, G. Costa, A. Bazan, T. Leflour, J.M. Noppe, N. Bulgakov, C. De La Taille, P. Petroff, C. Fuglesang, J. Colas, Marzio Nessi, A. Hrisoho, H. Zaccone, J-P. Meyer, Veljko Radeka, E. Auge, Arthur Schaffer, D. Stephani, Howard Gordon, Nicolas Seguin, Louis Fayard, Marcello Mazzanti, G. Le Meur, J. Teiger, Michel Lefebvre, J.L. Chevalley, Ph. Jean, M. Sciamanna, G. Battistoni, Laura Perini, L. Gosset, G. Parrour, D.C. Rahm, J.C. Chollet, Daniel Fournier, J. P. Repellin, M. Maire, Guillaume Unal, V. Vuillemin, L. Mandelli, Bruno Mansoulie, D. Cavalli, Francesca Nessi-Tedaldi, J.M. Baze, G. Pessina, and A. Cravero

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Photon, Calorimeter (particle physics), Physics::Instrumentation and Detectors, Detector, Space resolution, Accordion, Nuclear physics, Liquid argon, High Energy Physics::Experiment, Granularity, Detectors and Experimental Techniques, Instrumentation
Abstract

A prototype liquid argon preshower detector with a strip granularity of 2.5 mm has been tested at the CERN SPS in front of a liquid argon Accordion calorimeter. For charged tracks a signal-to-noise ratio of 9.4 and a space resolution of 340 μm were measured; the rejection power against overlapping photons produced in the decay of 50 GeV π 0 's is larger than 3; the precision on

Published
1993

5. Precise measurements of the KS → γγ and KL → γγ decay rates

Author

A Lai, D Marras, J.R Batley, R.S Dosanjh, T.J Gershon, G.E Kalmus, C Lazzeroni, D.J Munday, E Olaiya, M.A Parker, T.O White, S.A Wotton, R Arcidiacono, G Barr, G Bocquet, A Ceccucci, T Cuhadar-Dönszelmann, D Cundy, N Doble, V Falaleev, L Gatignon, A Gonidec, B Gorini, P Grafström, W Kubischta, A Lacourt, I Mikulec, A Norton, B Panzer-Steindel, G Tatishvili, H Wahl, C Cheshkov, P Hristov, V Kekelidze, D Madigojine, N Molokanova, Yu Potrebenikov, A Zinchenko, V Martin, P Rubin, 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 Lenti, F Martelli, M Veltri, M Eppard, A Hirstius, K Holtz, K Kleinknecht, U Koch, L Köpke, P Lopes da Silva, P Marouelli, I Mestvirishvili, I Pellmann, A Peters, S.A Schmidt, V Schönharting, Y Schué, R Wanke, A Winhart, M Wittgen, J.C Chollet, L Fayard, L Iconomidou-Fayard, G Unal, I Wingerter-Seez, G Anzivino, P Cenci, E Imbergamo, P Lubrano, A Mestvirishvili, A Nappi, M Pepe, M Piccini, R Casali, C Cerri, M Cirilli, F Costantini, R Fantechi, L Fiorini, S Giudici, I Mannelli, G Pierazzini, M Sozzi, J.B Cheze, M De Beer, P Debu, F Derue, A Formica, R Granier de Cassagnac, G Gouge, G Marel, E Mazzucato, B Peyaud, R Turlay, B Vallage, M Holder, A Maier, M Ziolkowski, C Biino, N Cartiglia, F Marchetto, E Menichetti, N Pastrone, J Nassalski, E Rondio, M Szleper, W Wislicki, S Wronka, H Dibon, M Jeitler, M Markytan, G Neuhofer, M Pernicka, A Taurok, and L Widhalm

Subjects
Physics, Particle physics, Nuclear and High Energy Physics, Chiral perturbation theory, Large Hadron Collider, Branching fraction, decadimenti, Astrophysics::High Energy Astrophysical Phenomena, Detector, Intensity (physics), Gamma gamma, Nuclear physics, mesoni K, High Energy Physics::Experiment, Nuclear Experiment, Beam (structure)
Abstract

The KS → γγ decay rate has been measured with the NA48 detector using a high intensity short neutral beam from the CERN SPS. The measured branching ratio BR(KS → γγ) = (2.78 ± 0.06stat ± 0.04syst) x 10-6, obtained from 7461 ± 172 KS → γγ events, is significantly higher than the O(p4) prediction of chiral perturbation theory. Using a KL beam the ratio Γ(KL → γγ)/Γ(KL → π0π0π0) = (2.81 ± 0.02syst) ×10-3 has been measured. © 2002 Elsevier Science B.V. All rights reserved.

Published
2003

6. Electronic chain for the readout of a fast liquid argon prototype calorimeter

Author

A. Ferrari, J-P. Meyer, A. Hrisoho, B. Merkel, J.P. Vialle, Nicolas Seguin, J. Colas, H. Zaccone, Marzio Nessi, D. Stephani, G. Guilhem, P. Farthouat, Francesca Nessi-Tedaldi, Howard Gordon, Isabelle Wingerter-Seez, M. Lebeau, L. Mandelli, Pierre Petroff, O. Gildemeister, Lydia Iconomidou-Fayard, M. Maire, D.V. Camin, C.W. Fabjan, T. Leflour, Paola Sala, B. Beaugiraud, Louis Fayard, Donatella Cavalli, F. Gianotti, Arthur Schaffer, Ph. Jean, J. Thion, A. Franz, P. Petitpas, Peter Jenni, Giuseppe Costa, D.C. Rahm, J.C. Chollet, J.L. Chevalley, P. Lavocat, Daniel Fournier, G. Battistoni, G. Parrour, Laura Perini, W. Richter, J. F. Renardy, B. Mnasoulie, J. Teiger, Michel Lefebvre, J. P. Repellin, A. Bazan, E. Auge, J.C. MeMarec, J.M. Noppe, L. Gosset, Veljko Radeka, C. De La Taille, J. J. Veillet, Graham R. Stevenson, C. Fuglesang, B. Aubert, M. Mazzanti, M. Pepe, W.J. Willis, J.M. Baze, and R. Chase

Subjects
Physics, Cryostat, Argon, Large Hadron Collider, Calorimeter (particle physics), Physics::Instrumentation and Detectors, business.industry, Preamplifier, Amplifier, chemistry.chemical_element, JFET, Nuclear physics, chemistry, Nuclear electronics, Optoelectronics, High Energy Physics::Experiment, business
Abstract

Summary form only given. A research and development program is being conducted in view of realizing an electromagnetic and hadronic calorimeter for the Large Hadron Collider (LHC). The authors report on tests on fast electronics, coupled to an electromagnetic prototype calorimeter built with an accordion structure. Three different types of preamplifiers have been used. In two (Si and GaAs hybrids), the preamplifier is operated in liquid argon. In the third one, a common based (Si JFET or GaAs) transistor is in the liquid, the charge preamplifier being outside the cryostat, after about 6 m of 50- Omega cable. The shaping amplifier uses RC-CR filtering. The response to a short current pulse peaks after about 20 ns. When the system is connected to the calorimeter, the liquid argon signals peak, as expected, after 30 ns. Noise, linearity, and cross-talk between channels were investigated. First results from an exposure of the calorimeter to electrons of energy 30 to 175 GeV were obtained. >

Published
2002

7. A precision measurement of direct CP violation in the decay of neutral kaons into two pions

Author

J.R Batley, R.S Dosanjh, T.J Gershon, G.E Kalmus, C Lazzeroni, D.J Munday, E Olaiya, M Patel, M.A Parker, T.O White, S.A Wotton, R Arcidiacono, G Barr, G Bocquet, A Ceccucci, T Cuhadar-Dönszelmann, D Cundy, N Doble, V Falaleev, L Gatignon, A Gonidec, B Gorini, P Grafström, W Kubischta, I Mikulec, A Norton, S Palestini, B Panzer-Steindel, D Schinzel, H Wahl, C Cheshkov, P Hristov, V Kekelidze, D Madigojine, N Molokanova, Yu Potrebenikov, A Zinchenko, P Rubin, R Sacco, A Walker, D Bettoni, R Calabrese, P Dalpiaz, J Duclos, P.L Frabetti, A Gianoli, M Martini, L Masetti, F Petrucci, M Savrié, M Scarpa, A Bizzeti, M Calvetti, G Collazuol, E Iacopini, M Lenti, F Martelli, G Ruggiero, M Veltri, D Coward, M Eppard, A Hirstius, K Holtz, K Kleinknecht, U Koch, L Köpke, P Lopes da Silva, P Marouelli, I Mestvirishvili, C Morales, I Pellmann, A Peters, B Renk, S.A Schmidt, V Schönharting, R Wanke, A Winhart, J.C Chollet, L Fayard, G Graziani, L Iconomidou-Fayard, G Unal, I Wingerter-Seez, G Anzivino, P Cenci, E Imbergamo, G Lamanna, P Lubrano, A Mestvirishvili, A Nappi, M Pepe, M Piccini, M Valdata-Nappi, R Casali, C Cerri, M Cirilli, F Costantini, R Fantechi, L Fiorini, S Giudici, I Mannelli, G Pierazzini, M Sozzi, J.B Cheze, M De Beer, P Debu, F Derue, A Formica, G Gouge, G Marel, E Mazzucato, B Peyaud, R Turlay, B Vallage, M Holder, A Maier, M Ziolkowski, C Biino, N Cartiglia, M Clemencic, F Marchetto, E Menichetti, N Pastrone, J Nassalski, E Rondio, W Wislicki, S Wronka, H Dibon, M Jeitler, M Markytan, G Neuhofer, M Pernicka, A Taurok, L Widhalm, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), NA48, and Kerec, Hélène

Subjects
neutral kaon, Nuclear and High Energy Physics, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], PREDICTION, direct CP violation, STANDARD MODEL, FOS: Physical sciences, neutral kaons, CP violation, epsilon'/epsilon parameter, mesoni K, decadimenti, violazione dretta dii CP, K meson, decay, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, EPSILON'/EPSILON, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], MESON SYSTEM, CRYSTAL, 010306 general physics, Physics, kaon decay, Large Hadron Collider, 010308 nuclear & particles physics, NA48 experiment, Yield (chemistry), High Energy Physics::Experiment, Particle Physics - Experiment
Abstract

The direct CP violation parameter Re(epsilon'/epsilon) has been measured from the decay rates of neutral kaons into two pions using the NA48 detector at the CERN SPS. The 2001 running period was devoted to collecting additional data under varied conditions compared to earlier years (1997-99). The new data yield the result: Re(epsilon'/epsilon) = (13.7 +/- 3.1) times 10^{-4}. Combining this result with that published from the 1997, 98 and 99 data, an overall value of Re(epsilon'/epsilon) = (14.7 +/- 2.2) times 10^{-4} is obtained from the NA48 experiment., Comment: 19 pages, 5 figures, to be published in Physics Letters B

Published
2002

8. New measurements of the η and K0 masses

Author

A. Lai, D. Marras, J.R. Batley, A.J. Bevan, R.S. Dosanjh, T.J. Gershon, G.E. Kalmus, C. Lazzeroni, D.J. Munday, 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, W. Funk, L. Gatignon, A. Gonidec, B. Gorini, G. Govi, P. Grafström, W. Kubischta, A. Lacourt, M. Lenti, I. Mikulec, A. Norton, S. Palestini, B. Panzer-Steindel, D. Schinzel, G. Tatishvili, H. Taureg, M. Velasco, H. Wahl, C. Cheskov, P. Hristov, V. Kekelidze, D. Madigojine, N. Molokanova, Yu. Potrebenikov, A. Zinchenko, V.J. Martin, P. Rubin, R. Sacco, A. Walker, D. Bettoni, R. Calabrese, M. Contalbrigo, P. Dalpiaz, J. Duclos, P.L. Frabetti, A. Gianoli, E. Luppi, M. Martini, L. Masetti, F. Petrucci, M. Savrié, M. Scarpa, A. Bizzeti, M. Calvetti, G. Collazuol, G. Graziani, E. Iacopini, F. Martelli, M. Veltri, H.G. Becker, M. Eppard, H. Fox, A. Hirstius, K. Holtz, A. Kalter, K. Kleinknecht, U. Koch, L. Köpke, P. Lopes da Silva, P. Marouelli, I. Mestvirishvili, I. Pellmann, A. Peters, 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, G. Lamanna, P. Lubrano, A. Mestvirishvili, A. Nappi, M. Pepe, M. Piccini, R. Casali, C. Cerri, M. Cirilli, F. Costantini, R. Fantechi, L. Fiorini, S. Giudici, I. Mannelli, G. Pierazzini, M. Sozzi, J.B. Cheze, J. Cogan, M. De Beer, P. Debu, F. Derue, A. Formica, G. Gouge, R. Granier de Cassagnac, G. Marel, E. Mazzucato, B. Peyaud, R. Turlay, B. Vallage, M. Holder, A. Maier, M. Ziolkowski, R. Arcidiacono, C. Biino, N. Cartiglia, R. Guida, F. Marchetto, E. Menichetti, N. Pastrone, J. Nassalski, E. Rondio, M. Szleper, W. Wislicki, S. Wronka, H. Dibon, M. Jeitler, M. Markytan, G. Neuhofer, M. Pernicka, A. Taurok, and L. Widhalm

Subjects
mass measurement, Physics, eta meson, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, NA48 EXPERIMENT, Physics::Instrumentation and Detectors, Detector, MESON, CERN, mesoni K, mesoni eta, massa mesoni, K meson, High Energy Physics - Experiment, High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract

New measurements of the $\eta$ and $K^0$ masses have been performed using decays to 3$\pi^0$ with the NA48 detector at the CERN SPS. Using symmetric decays to reduce systematic effects, the results $M(\eta) = 547.843\pm0.051$ MeV/c$^2$ and $M(K^0) = 497.625\pm0.031$ MeV/c$^2$ were obtained., Comment: 17 pages, 4 figures to be published in Physics Letters B

Published
2002

9. Results from a new combined test of an electromagnetic liquid argon calorimeter with a hadronic scintillating-tile calorimeter

Author

Bernard Aubert, H. Evans, P. Stavina, A. Gordeev, T. Del Prete, M. Turcotte, F. Daudon, A. Savoy-Navarro, J. J. Thaler, Rupert Leitner, S. Rescia, J. Santos, I. Efthymiopoulos, Howard Gordon, A. Maio, F. S. Merritt, B. Sellden, C. Hebrard, P. Perrodo, Marzio Nessi, E. Delagnes, M. Wielers, Gerard Montarou, L. E. Price, P. Brette, E. Shaldaev, F. Albiol, Giuseppe Mornacchi, V. Simaitis, A. Le Van Suu, F. Henry-Couannier, S. Vorozhtsov, Johann Collot, Armen Vartapetian, L. Martin, S. V. Kopikov, B. Di Girolamo, Dominique Breton, R. Stanek, Yu.F. Lomakin, P. de Saintignon, J.C. Berset, A. Mirea, R. Miller, W. E. Cleland, M. J. Shochet, E. Mazzoni, O. Gildemeister, O. Martin, Patrick Fassnacht, Claudio Santoni, Y. A. Tikhonov, D. Nicod, H. Plothow-Besch, R. Cases, J.C. Chollet, Laura Perini, Y. Jacquier, Patrick Puzo, F. Etienne, C. Bohm, J. Schwindling, B. Canton, A. Belyman, A. Chekhtman, Joao Seixas, N. Yamdagni, M. Chalifour, Marina Cobal, Dominique Pallin, O. Linossier, M. Seman, N. Fedyakin, C. Liapis, O. Pukhov, V. Grabsky, A. Pereira, V.A. Sidorov, P. Vincent, A. Juste, J. Colas, F. Gianotti, M.V. Kuzmin, Daniel Fournier, Bengt Lund-Jensen, J. Dodd, Elemer Nagy, João Carvalho, Petr Tas, Imma Riu, M. Kostrikov, B. Michel, M. Moynot, G. Renzoni, F. Cogswell, Livio Mapelli, A. Surkov, G. Chlachidze, Stefan Simion, E. K. Johansson, S. Cologna, R. W. Stephens, S. Malyukov, R. Spiwoks, Fukun Tang, Stefan Valkar, V. Klyukhin, C. W. Walter, Victor Kukhtin, C.P. Marin, Arthur Schaffer, V. V. Lapin, M.J. Varanda, A. Bogush, Michal Suk, V. Cavasinni, Stanislav Tokár, Paola Sala, G. Laborie, J. Roldan, S. Studenov, P. Nayman, S. Akhmadaliev, V. Glebov, S. Errede, E. Mnatsakanian, S. Lami, V. Glagolev, James Proudfoot, D. Cavalli, J. F. Renardy, K. Anderson, Ja Perlas, V. Kolomoets, Luc Poggioli, J.B. Romance, J.P. Richer, F. Teubert, Mihai Caprini, W. Seidl, V. Kovtun, A. Bazan, J. Belorgey, L. Baisin, P. Krivkova, V. M. Romanov, Marcello Mazzanti, J. Dawson, M. Mosidze, J. Fernández de Trocóniz, D. Costanzo, F. Farida, Ph Martin, V.N. Kozlov, Luis Hervas, P. Marrocchesi, Veljko Radeka, M. Crouau, O. Le Dortz, Francois Vazeille, J-Y. Hostachy, Mario David, M. Haney, Isabelle Wingerter-Seez, J.M. Noppe, Luis Labarga, P. Romero, Laurent Serin, F. Marroquin, V. Senchishin, M. Niculescu, Evgeny Starchenko, M. Citterio, J. Pinhao, S. Dita, Andrew White, E. Sanchis, T. Le Flour, G. M. Kolachev, A. Zaitsev, Fernando Barreiro, Christopher Bee, Silvia Resconi, M. Kulagin, H. Sanders, H. Hakopian, I. Chirikov-Zorin, J. Dolejsi, G. Reinmuth, Kaushik De, Yu. Protopopov, S. Tardell, D. Makowiecki, L. Miralles, A. Ferrari, P.-Y. Duval, A. N. Sissakian, Stanislav Nemecek, Juan Antonio Garcia Pascual, P. d'Argent, S. Poirot, J.P. Lottin, Stéphane Jézéquel, J.P. Taguet, M. Gaspar, Pierre Petroff, J. Budagov, E. Gallas, A. Ferrer, Li Jingyuan, Yu. Ivanyushenkov, A. Semenov, G. Garcia, Emmanuel Monnier, M. Huet, P. Sonderegger, Dan Pantea, Driss Benchekroun, M. Bosman, V. Vuillemin, P. Grenier, Riccardo Paoletti, D. Lissauer, Kerstin Jon-And, J. Silva, L. Mandelli, M. L. Andrieux, Vladimir Vinogradov, Sylvain Tisserant, Z. Dolezal, F. Badaud, J. A. Parsons, Milos Lokajicek, G.-S. Muanza, Y. Kulchitsky, Francisco Camarena, E. Auge, F. Spano, O. Borisov, M.V. Castillo, J.C. Park, R. Snopkov, V. Tisserand, J. Del Peso, Fares Djama, R. Zitoun, Pilar Casado, Z. Trka, N. Massol, Alexey Maslennikov, M. Cavalli-Sforza, M. Leltchouk, D. Errede, H. Wolters, D.C. Rahm, C. Clement, N. D. Topilin, K. Soustruznik, Igor Soloviev, Yu.A. Khokhlov, P. Karst, C. Bromberg, J. Thion, P. Schwenling, J. Lundquist, C. Yosef, D. V. Camin, S. Berglund, G. Yarygin, A. Shchelchkov, Helio Takai, A. Solodkov, J. Teiger, N. Seguin-Moreau, G. Fumagalli, S. Constantinescu, Chiara Roda, J.M. Lopez Amengual, R. A. Richards, G. Costa, D. Imbault, Lee Sawyer, L. Caloba, V. Flaminio, P. Borgeaud, J.L. Chevalley, W. Bonivento, R. Chadelas, António Amorim, L. P. Says, N. Bouhemaid, A. Gomes, Ivan Sykora, G. Parrour, E. Grauges, Irakli Minashvili, C. De La Taille, J. Huston, A. N. Karyukhin, J. Soderqvist, Y. Zolnierowski, B. Dinkespiler, E. Higon, O. Lomakina, Bruno Mansoulie, F. Lobkowicz, N. Russakovitch, S. Kakurin, R. W.L. Jones, T. Davidek, J.J. Dugne, G. Ambrosini, G. Eynard, S. Nicoleau, R. Downing, D. Dzahini, G. Battistoni, I. Vichou, Abdeslam Hoummada, S. González de la Hoz, K. Bazizi, Didier Lacour, J.P. Coulon, M. Lefebvre, G. Blanchot, Sergey Burdin, Vicente González, A. Onofre, G. Sauvage, A. Henriques, D. Sauvage, Jemal Khubua, S. O. Holmgren, James Pilcher, V. Boldea, P. Amaral, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), ATLAS, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Large Hadron Collider, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, ATLAS experiment, Hadron, Electron, 7. Clean energy, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, Scintillation counter, Combined test, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, High Energy Physics::Experiment, digital document, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Nuclear Experiment, Instrumentation
Abstract

A new combined test of an electromagnetic liquid argon accordion calorimeter and a hadronic scintillating-tile calorimeter was carried out at the CERN SPS. These devices are prototypes of the barrel calorimeter of the future ATLAS experiment at the LHC. The energy resolution of pions in the energy range from 10 to 300 GeV at an incident angle [theta] of about 12° is well described by the expression , where E is in GeV. The response to electrons and muons was evaluated. Shower profiles, shower leakage and the angular resolution of hadronic showers were also studied. Results are compared with those from the previous beam test. http://www.sciencedirect.com/science/article/B6TJM-40T92X2-3/1/f68437c8f1c85f5817691c5502bd8c3b

Published
2000

10. Construction and test of a fine-grained liquid argon preshower prototype

Author

Giuseppe Costa, G. Eynard, D.C. Rahm, D. VanDenPlas, J. Boniface, J-P. Meyer, Daniel Fournier, S. Nicoleau, P. Dargent, C. De La Taille, J. Soderqvist, E. Fernandez, A. Savoy-Navarro, P. Depommier, Paola Sala, Stephane Jezequel, Donatella Cavalli, Sylvain Tisserant, Isabelle Wingerter-Seez, G. Sauvage, S. Robertson, Douglas Gingrich, C. Padilla, James Pinfold, Veljko Radeka, Laura Perini, J. Teiger, Arthur Schaffer, W. Richter, J. F. Renardy, Irene Vichou, A. Hoummada, G. Mahout, J.P. Lottin, V. Vuillemin, Emmanuel Monnier, D. Stephani, Howard Gordon, Bruno Mansoulie, L. Mandelli, N. Seguin-Moreau, J.L. Chevalley, G. Laborie, V. Tisserand, D. Fouchez, L. Baisin, A. Miotto, B. Aubert, J-Y. Hostachy, M. Chmeissani, M. Mazzanti, Claude Leroy, M. C. Cousinou, L. Cozzi, Laurent Serin, A. Hrisoho, T. Leflour, J.C. Berset, Louis Fayard, Johann Collot, Luis Hervas, C. Olivetto, J. Colas, Marzio Nessi, M. Lefebvre, Daniel Dzahini, F. Etienne, B. Canton, O. Le Dortz, Patrick Fassnacht, J.M. Baze, Ll. Garrido, B. O. Zhautykov, G. Battistoni, L. O. Eek, E. León-Florián, R. Chase, Bengt Lund-Jensen, A. Chekhtman, J. F. Genat, N. L. Rodning, P. Roy, R. Davis, Miriam Lucio Martinez, L. Gosset, G. Parrour, P. Schwemling, A. Bazan, Silvia Resconi, N. Fedyakin, P. Lavocat, R. Zitoun, E. Auge, O. Linossier, J.M. Noppe, Y. Zolnierowski, L. Martin, J. Thion, J. David, C.P. Marin, Elemer Nagy, Gilles Beaudoin, Didier Imbault, F. Rival, Edouard Boos, B. Dinkespiller, P. de Saintignon, J.C. Chollet, J. Schwindling, B. Merkel, Andrea Ferrari, Luc Poggioli, Pierre Petroff, D.V. Camin, F. Gianotti, B. Beaugiraud, O. Gildemeister, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), RD3, Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Photon, Calorimeter (particle physics), Preamplifier, Physics::Instrumentation and Detectors, Detector, Electron, Azimuth, Nuclear physics, CMOS, High Energy Physics::Experiment, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, Instrumentation
Abstract

A separate liquid argon preshower detector consisting of two layers featuring a fine granularity of 2.5~10$^{\mathrm{-3}}$ was studied by the RD3 collaboration. A prototype covering approximately 0.8 in pseudo-rapidity and 9 degrees in azimuth was built and tested at CERN in July 94. CMOS and GaAs VLSI preamplifiers were designed and tested for this occasion. The combined response of this detector and an accordion electromagnetic calorimeter prototype to muons, electrons and photons is presented. For minimum ionizing tracks a signal-to-noise ratio of 4.5 per preshower layer was measured. Above 150~GeV the space resolution for electrons is better than 250~$\mu$m in both directions. The precision on the electromagnetic shower direction, determined together with the calorimeter, is better than 4 mrad above 50~GeV. It is concluded that the preshower detector would adequately fulfil its role for future operation at CERN Large Hadron Collider.

Published
1997

11. Performance of an endcap prototype of the ATLAS accordion electromagnetic calorimeter

Author

Y. Zolnierowski, B. Olsen, Bruno Mansoulie, Louis Fayard, S. Robertson, M. Stipcevic, C. V. Scheel, Stephane Jezequel, E. Fernandez, Gilles Beaudoin, P. Depommier, B. Aubert, Isabelle Wingerter-Seez, Sylvain Tisserant, J-P. Meyer, D.V. Camin, M. Mazzanti, B. Dinkespiller, Doug Gingrich, Paola Sala, F. Rival, Luis Hervas, O. Le Dortz, Donatella Cavalli, N. Fedyakin, J. Boniface, T. Leflour, J.P. Lottin, E. Auge, James Pinfold, J.L. Chevalley, B. Canton, Laura Perini, Miriam Lucio Martinez, B. Merkel, Andrea Ferrari, C. Olivetto, N. L. Rodning, D. Dzahini, A. Cravero, L. Martin, R. Zitoun, B. Beaugiraud, G. Mahout, A. Chekhtman, Luc Poggioli, P. de Saintignon, J. Thion, J. David, V. Vuillemin, Veljko Radeka, O. Gildemeister, G. Battistoni, L. Labarga, L. Mandelli, Johann Collot, Bengt Lund-Jensen, P. Dargent, A. Savoy-Navarro, L. Gosset, G. Parrour, J. Teiger, Irene Vichou, V. Tisserand, J-Y. Hostachy, J.C. Chollet, J. Schwindling, P. Lavocat, M. Lefebvre, J.C. Berset, Giuseppe Costa, M. Seman, Daniel Fournier, F. Gianotti, Didier Imbault, R. Chase, Patrick Fassnacht, C.P. Marin, J. Pouxe, M. Maire, Pierre Petroff, G. Greeniaus, Georges Azuelos, C. Padilla, P. Schwemling, Elemer Nagy, A. Bazan, J. F. Genat, Edouard Boos, G. Laborie, E. Merchez, D. Stephani, Howard Gordon, D.C. Rahm, J.M. Noppe, L. Baisin, J. S. White, Claude Leroy, A. Hrisoho, P. Kitching, W. Richter, J. F. Renardy, F. Etienne, Arthur Schaffer, D. Van den plas, L. O. Eek, L. Cozzi, D. Fouchez, O. Martin, C. De La Taille, A. Miotto, J. Soderqvist, Ll. Garrido, E. León-Florián, J. Colas, Marzio Nessi, N. Seguin-Moreau, M. Chmeissani, Laurent Serin, P. Roy, J.M. Baze, B. O. Zhautykov, Emmanuel Monnier, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), RD3, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Argon, Large Hadron Collider, Atlas (topology), Physics::Instrumentation and Detectors, ATLAS experiment, Linearity, chemistry.chemical_element, Calorimetry, Nuclear physics, chemistry, calorimetry, liquid-argon, ATLAS, Cathode ray, Rapidity, High Energy Physics::Experiment, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, Instrumentation
Abstract

The design and construction of a lead-liquid argon endcap calorimeter prototype using an accordion geometry and conceived as a sector of the inner wheel of the endcap calorimeter of the future ATLAS experiment at the LHC is described. The performance obtained using electron beam data is presented. The main results are an energy resolution with a sampling term below $11\%/\sqrt{E(\rm GeV)}$ and a small local constant term, a good linearity of the response with the incident energy and a global constant term of 0.8\% over an extended area in the rapidity range of $2.2 < \eta

Published
1996

12. Performance of a liquid argon accordion calorimeter with fast read-out

Author

P. Lavocat, D. Cavalli, Isabelle Wingerter-Seez, C.W. Fabjan, Peter Jenni, W. Richter, J. F. Renardy, J. Colas, Marzio Nessi, A. Bazan, J.M. Noppe, M. Maire, J.P. Lottin, C. Fuglesang, Guillaume Unal, G. Pessina, B. Beaugiraud, O. Gildemeister, M. Lefebvre, Y. Zolnierowski, F. Gianotti, B. Aubert, Sherry Towers, P. Petroff, Paola Sala, Arthur Schaffer, J.C. Chollet, M. Pepe, Marcello Mazzanti, E. Auge, D.C. Rahm, Louis Fayard, J.L. Chevalley, Veljko Radeka, M. Sciamanna, G. Battistoni, L. Gosset, G. Parrour, A. Cravero, L. Mandelli, Laura Perini, Daniel Fournier, J. P. Repellin, Bruno Mansoulie, Nicolas Seguin, F. Nessi-Tedaldi, Ph. Jean, C. De La Taille, Lydia Iconomidou-Fayard, H. Zaccone, J. Teiger, J.M. Baze, G. Costa, R. Chase, B. Merkel, Andrea Ferrari, J.P. Vialle, D.V. Camin, J. Soderqvist, A. Franz, T. Leflour, J-P. Meyer, D. Stephani, and Howard Gordon

Subjects
Physics, Nuclear and High Energy Physics, Muon, Large Hadron Collider, Calorimeter (particle physics), Physics::Instrumentation and Detectors, Hadron, Detector, Electron, Nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Angular resolution, Detectors and Experimental Techniques, Nuclear Experiment, Instrumentation, Noise (radio)
Abstract

A prototype lead-liquid-argon electromagnetic calorimeter with parallel plates and Accordion geometry has been equipped with high speed readout electronics and tested with electron and muon beams at the CERN SPS. For a response peaking time of about 35 ns, fast enough for operation at the future hadron colliders, the energy resolution for electrons is 9.6%/√E[GeV] with a local constant term of 0.3% and a noise contribution of 0.33 E[ GeV ] . The spatial accuracy achieved with a detector granularity of 2.7 cm is 3.7 mm E[ GeV ] and the angular resolution 12 mrad at 60 GeV.

Published
1992

13. LIQUID ARGON CALORIMETRY WITH LHC-PERFORMANCE SPECIFICATIONS

Author

Isabelle Wingerter-Seez, W. Richter, J. F. Renardy, C.P. Marin, G. Guilhem, Lydia Iconomidou-Fayard, J.C. Berset, J. Colas, Marzio Nessi, J.M. Baze, L. Baisin, A. Bazan, B. Beaugiraud, P. Farthouat, J. J. Veillet, O. Gildemeister, J.M. Noppe, Arthur Schaffer, P. Petroff, J.L. Chevalley, L. Mandelli, M. Lebeau, G. Costa, F. Cavanna, A. Sigrist, F. Nessi-Tedaldi, G. Battistoni, P. Lavocat, G. Pessina, L. Gosset, Marcello Mazzanti, G. Parrour, C.W. Fabjan, R. Chase, F. Gianotti, J.C. LeMarec, D.C. Rahm, Peter Jenni, E. Augé, Laura Perini, Ph. Jean, B. Merkel, Andrea Ferrari, J.P. Vialle, Daniel Fournier, P. Petitpas, M. Maire, J. P. Repellin, Michel Lefebvre, Bruno Mansoulie, A. Franz, G. Polesello, C. De La Taille, H. Zaccone, Venetios Polychronakos, J. Teiger, Graham R. Stevenson, D. Cavalli, Nicolas Seguin, Veljko Radeka, C. Fuglesang, B. Aubert, M. Pepe, Louis Fayard, J-P. Meyer, D.V. Camin, D. Stephani, Howard Gordon, A. Hrisoho, T. Leflour, J. Thion, J.C. Chollet, and W. J. Willis

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Physics::Instrumentation and Detectors, Hadron, Resolution (electron density), Calorimetry, Electron, Calorimeter, Nuclear physics, High Energy Physics::Experiment, Granularity, Instrumentation, Energy (signal processing)
Abstract

A novel geometry liquid argon calorimeter with accordion-shaped electrodes and converter plates has been recently conceived. Such a design allows for a fast readout and for a high granularity over large volumes with minimal dead spaces, properties which are considered essential for operation at the future hadron colliders. The first electromagnetic prototype based on this scheme has been built and tested at the CERN SPS. For a response peaking time of 140 ns an energy resolution of 10%/√ E (GeV) and a space resolution of 4.4 mm/√ E (GeV) with 2.7 cm cell size were achieved for electrons. A few preliminary results from a test with fast readout (response peaking time of less than 40 ns) are also presented.

Published
1992

14. First measurement of the decay branching ratios

Author

P. Igo-Kemenes, H. W. Siebert, P. W. Jeffreys, R. M. Brown, B. Merkel, R. Morand, Daniel Froidevaux, S.N. Tovey, Y. Chatelus, J.C. Chollet, B. J. Saunders, K. P. Streit, M. Bourquin, J. P. Repellin, A. R. Fyfe, A. Degré, Vincent J Smith, G. Sauvage, C. N. P. Gee, B. Schiby, R. Strub, J. J. Thresher, W. M. Gibson, H. Plothow, and J. M. Gaillard

Subjects
Physics, Nuclear and High Energy Physics, Branching fraction, Analytical chemistry, Branching (polymer chemistry)
Abstract

In an experiment in the CERN-SPS charged-hyperon beam, the main Ω − decay branching ratios have been measured to be Γ(Ω − →Λ K − /Γ( all )=0.686±0.013 , Γ(Ω −1 →Ξ 0 π − )/Γ( all )=0.234±0.013 , Γ(Ω − →Ξ − π 0 )/Γ( all )=0.080±0.008 . The relative branching ratio of the two Ξπ modes provides a test of the ΔI= 1 2 rule in decuplet-octet transitions. A search has also been made for the rare decay modes Ω − →Λπ − , Ω − →Ξ − γ, Ω − →Ξ − π + π − and Ω − →Ξ 0 e − ν .

Published
1979

15. A measurement of the Ω− lifetime

Author

P. Igo-Kemenes, J. J. Tresher, H. Plothow, B. Merkel, G. Sauvage, B. Schiby, Daniel Froidevaux, S.N. Tovey, Y. Chatelus, R. Morand, J. M. Gaillard, C. N. P. Gee, K. P. Streit, A. Degré, M. Bourquin, P. W. Jeffreys, J. P. Repellin, W. M. Gibson, R. M. Brown, J.C. Chollet, B. J. Saunders, H. W. Siebert, Vincent J Smith, A. R. Fyfe, and R. Strub

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Spectrum (functional analysis), Sample (graphics), Beam (structure)
Abstract

In an experiment at the CERN-SPS charged-hyperon beam, a sample of 2500 Ω − → ΛK − decays has been collected at Ω− momenta of 98.5 and 115 GeV/c. The Ω− lifetime is found to be τ Ω = (0.822 ± 0.028) × 10 −10 s .

Published
1979

16. Measurements of hyperon semileptonic decays at the CERN Super Proton Synchrotron

Author

G. Sauvage, J.C. Chollet, J. J. Thresher, R. Morand, K. P. Streit, P. Igo-Kemenes, J. P. Repellin, M. Bourquin, A. Degré, R.J. Ott, P. W. Jeffreys, B. Merkel, Vincent J Smith, Daniel Froidevaux, A. R. Fyfe, W. M. Gibson, R.J. Gray, Y. Chatelus, Robert M Brown, H. W. Siebert, R. Strub, H. Plothow, J. M. Gaillard, B. J. Saunders, B. Schiby, and C. N. P. Gee

Subjects
Physics, Large Hadron Collider, Physics and Astronomy (miscellaneous), Proton, Branching fraction, Hyperon, Dalitz plot, Super Proton Synchrotron, Baryon, Nuclear physics, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Engineering (miscellaneous)
Abstract

The charged hyperon beam at the CERN Super Proton Synchrotron (SPS) has been used to collect data on semileptonic decays ofΣ−,Ξ− andΛ. A magnetic channel selects 100 GeV/c negatively charged particles produced in the forward direction by interaction of the 200 GeV/c SPS proton beam on a BeO target. TheΣ− andΞ− hyperons are concurrently identified in a DISC Cerenkov counter, and their decay products are analysed by a magnetic spectrometer. Electron-hadron discrimination is achieved by the combined use of lead-glass and lead/scintillator counters, transition radiation detectors, and a Cerenkov counter. In this article we report results on the\(\Sigma ^ -\to \Lambda e^ -\bar v\) decay mode. Measurements of the Λ polarization and of the centre-of-mass distributions (baryon kinetic energy, electron-neutrino correlation, and Dalitz plot distributions) yield the vector to axialvector form factor ratiof1/g1=+0.034±0.080, in agreement with the value expected from the conserved vector current hypothesis (f1/g1=0). TheΣ−→Λe−v→ branching ratio measurement gives a value of (5.41±0.30)×10−5. The effects of radiative corrections are not included in these results. They are discussed in the text. Results on the otherΞ−,Σ−, andΛ semileptonic decays are reported in separate articles.

Published
1982

17. Measurement of elastic Σ−p scattering at 17.2 GeV/c

Author

A. Navard-Savoy, I. Videau, J. Lefrançois, H. Videau, O. Callot, J.C. Chollet, J. Badier, R. Morand, R. Vanderhaghen, J. J. Blaising, B. Merkel, Y. Chatelus, A. Romana, and G. Sauvage

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Cross section (physics), Scattering, Interval (graph theory)
Abstract

Elastic Σ − p and π − p cross section have been measured at 17.2 GeV/ c in the t interval −0.12, −0.38 (GeV/ c ) 2 . The Σ − p slope is b = 8.12 ± 0.35 (GeV/ c ) −2 .

Published
1975

18. Transition and synchrotron radiation produced by electrons and particle discrimination

Author

Ph. Jean, B. Merkel, G. Sauvage, J.M. Gaillard, M. Dialinas, J.C. Chollet, J.-P. Repellin, Maurice Bourquin, A. Hrisoho, Laboratoire de l'Accélérateur Linéaire (LAL), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Hadron, Synchrotron radiation, chemistry.chemical_element, General Medicine, Electron, 01 natural sciences, law.invention, Xenon, chemistry, Transition radiation, law, 0103 physical sciences, Particle, Lithium, Atomic physics, 010306 general physics, Radiator
Abstract

Transition radiation from a radiator of 650 lithium foils has been studied in a MWPC filled with a xenon-Co 2 mixture for two experimental configurations. With the chamber immediately behind the radiator, particle discriminations comparable to those reported in the literature (90% efficiency for electrons, 10% for hadrons) have been observed. With magnetic bending between the radiator and the xenon chamber typical efficiencies of 87% for electrons and less than 0.4% for hadrons have been measured. The discrimination obtained is at least a factor 20 better than for the more conventional configuration. In the latter case, synchrotron radiation has also been observed.

Published
1976

19. Measurement of Ω− decay properties in the CERN SPS hyperon beam

Author

R. Strub, J.C. Chollet, M. Jung, M. Bourquin, R. Morand, Hartmute Plothow-Besch, J.P. Gerber, J.-M. Gaillard, Vincent J Smith, P.W. Jeffreys, B. Schiby, W.M. Gibson, J.-L. Riester, G. Sauvage, Daniel Froidevaux, R.M. Brown, B.J. Saunders, H. W. Siebert, K. P. Streit, P. Igo-Kemenes, B. Merkel, C.N.P. Gee, J. J. Thresher, J.-P. Repellin, A. Degré, and S. N. Tovey

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Analytical chemistry, Hyperon, Atomic physics
Abstract

In an experiment in the CERN SPS charged hyperon beam, a sample of 16 000Ω− decays was collected at an Ω− momentum of 131 GeV/c the Ω− lifetime, the branching ratios and decay asymmetry parameters for the main decay modes were measured, giving: τ Ω − =(0.823±0.015)×10 −10 s , Γ(Ω − →Λ K − ) Γ(Ω − -→ all ) =0.675±0.008 , α(Ω − →Λ K − )= −0.025±0.028, Γ(Ω − →Ξ 0 π − ) Γ(Ω − → all ) = 0.236±0.008 , α(Ω − →Ξ 0 π − )=0.09±0.14, Γ(Ω − →Ξ − π 0 ) Γ(Ω − → all ) =0.089±0.005 , α(Ω − →Ξ − π 0 )=0.05±0.21. For the rare decay modes, the following results for the branching ratios were obtained: if Γ(Ω − →Ξ 0 e − ν ) Γ(Ω − → all ) =(0.56±0.28)×10 −2 , if Γ(Ω − →Ξ − π + π − ) (Γ(Ω→ all ) =(3.7 −1.1 +3.6 )×10 −4 , Γ(Ω − →Ξ − γ) (Γ(ω − → all ) −3 at the 90% confidence level, Γ(Ω − →Λπ − ) (Γ(Ω − → all ) −4 at the 90% confidence level . A sample of 32 000 Ξ− decays collected under the same experimental conditions gave a new measurement of the Ξ− lifetime: τ Ξ − =(1.652±0.051)×10 −10 s . Combining the measurements of the present experiment with those obtained in a previous experiment in the SPS hyperon beam gives: if τ Ω − =(0.823±0.013)×10 −10 s , Γ(Ω − →Λ K − ) Γ(Ω − → all =0.678±0.007 , Γ(Ω − →Ξ 0 π − ) Γ(Ω − → all ) =0.236±0.007 , Γ(Ω − →Ξ − π 0 ) Γ(Ω − → all =0.086±0.004 , Γ(Ω − →Ξ − π + π − ) Γ(Ω − → all =(4.3 −1.3 +3.4 )×10 −4 . The experimental results are compared with theoretical calculations.

Published
1984

20. The Σ−p and Σ−d total cross sections at 19 GeV

Author

G. Sauvage, Thomas J. Devlin, J. Badier, J. M. Gaillard, R. W. Bland, R. Meunier, B. Merkel, R. Vanderhagen, J. Lefrançois, J. P. Repellin, J.C. Chollet, A. Romana, and D. Décamp

Subjects
Physics, Nuclear physics, Quark, Nuclear and High Energy Physics, Neutron cross section, Hyperon, Neutron, Sum rule in quantum mechanics
Abstract

The total cross sections of 18.7 GeV Σ − hyperons on protons and deutrons have been measured to be 34.0 ± 1.1 mb and 61.3 + 1.4 mb, respectively. The derived Σ − -neutron cross section is 30.0 ± 1.2 mb.

Published
1972

21. Negative hyperon production at high energy

Author

J. Lefrançois, J. P. Repellin, J. Badier, R. W. Bland, R. Meunier, Thomas J. Devlin, B. Merkel, Jean-Marc Gaillard, G. Sauvage, R. Vanderhaghen, and J.C. Chollet

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Proton, Hyperon, chemistry.chemical_element, Tungsten, Nuclear physics, Momentum, chemistry, Antiproton, Beam (structure)
Abstract

With a negative hyperon beam which we have constructed at the CERN PS we have measured the production by 24 GeV/c proton of K−, p , Σ−, and −, with respect to π− production. Measurements were made on a tungsten target under the following conditions: 1. at a fixed angle of 10 mrad for momenta between 13 and 20 GeV/c, 2. at a fixed momentum of 17.2 GeV/c for angles between 10 and 40 mrad. Production was studied on three targets (B4C, Al, W) at 17.2 GeV/c and 10 mrad. Photographs of hyperon decays have also been taken in a prototype streamer chamber.

Published
1972

22. Further results on the interference between the πoπo decay of KLo and KSo

Author

M.R. Jane, J.-M. Gaillard, K.R. Schubert, J.C. Chollet, J. P. Repellin, and B. Wolff

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Amplitude, chemistry, chemistry.chemical_element, Atomic physics, Interference (wave propagation), Copper
Abstract

The experiment of Chollet et al. has been continued with a similar set up. The analysis of these new data leads to 56 free decay events KLo→πoπo and 1481 interference events KS, Lo, → πoπo behind a 20 cm thick copper regenerator. The results are ϕoo = 38o ± 25o and |ηoo|/(|f−f|/k) = (1.13 ± 0.12) × 10−3 where |f−f|/k is the regeneration amplitude for copper at 2 GeV/c in fm2.

Published
1971

23. Measurement of the KL0 → 2γ branching ratio and search for KS0 → 2γ decays

Author

J.C. Chollet, K.R. Schubert, M.R. Jane, J.-M. Gaillard, J. P. Repellin, and B. Wolff

Subjects
Physics, Nuclear and High Energy Physics, Meson, Branching fraction, Atomic physics
Abstract

Using an optical spark chamber set-up, we have measured the two photon decay rate of neutral K mesons behind a regenerator. KL0 → 2γ decays are normalized to KS0 → 2π0 events, so the result depends on the K0 regeneration in copper at 2 GeV/c and has a value of Γ( K L 0 → 2γ) Γ( K L 0 → all ) = (5.0 ± 1.0) × 10 −4 [22 mb /(|ƒ− ƒ |/k)] 2 . KS0 → 2γ events are not observed, and from the normalization to KS0 → 2γ0 we get Γ( K S 0 → 2γ) Γ( K S 0 → all ) −3 with 90% conf

Published
1971

24. Test beam results of a stereo preshower integrated in the liquid argon accordion calorimeter

Author

Fernando Barreiro, B. Beaugiraud, B. Olsen, Stephane Jezequel, A. Chekhtman, S. Simion, O. Gildemeister, D. Makowiecki, Jorge-Armando Benitez Garcia, R. Davis, A. Hrisoho, D. VanDenPlas, Arthur Schaffer, S. Robertson, J.L. Chevalley, F. Etienne, J.P. Taguet, Y. Jacquier, Veljko Radeka, C. V. Scheel, C. W. Walter, Luis Hervas, B. Dinkespiller, A. Savoy Navarro, S. Rescia, O. Le Dortz, L. O. Eek, Helio Takai, O. Linossier, James Pinfold, Eric Delagnes, T. Le Flour, G. Battistoni, P. Depommier, Laura Perini, Isabelle Wingerter-Seez, Emmanuel Monnier, P. Schwemling, L. Gosset, G. Parrour, Silvia Resconi, Elemer Nagy, G. Sauvage, J-P. Meyer, A. Bazan, C. Padilla, J.P. Lottin, Donatella Cavalli, P. de Saintignon, G. Mahout, E. León-Florián, M. C. Cousinou, L. Martin, L. Cozzi, V. Tisserand, B.O. Zhautykov, Giuseppe Costa, Dominique Breton, B. Lund Jensen, M. Martmnez, M. Lefebvre, R. Chase, D. Stephani, Howard Gordon, V. Vuillemin, J.C. Chollet, J. Schwindling, G. Greenious, J.M. Noppe, M. Chmeissani, Laurent Serin, Gilles Beaudoin, N. Fedyakin, Johann Collot, L. Mandelli, D. Lissauer, D.C. Rahm, Y. Zolnierowski, B. Canton, E. Auge, P. Romero, C.P. Marin, J. Gonzales, E. Fernandez, N. Seguin-Moreau, J. Del Peso, Luc Poggioli, C. De La Taille, Ll. Garrido, Jm. Baze, R. Zitoun, Edouard Boos, J. Boniface, Hong Ma, G. Eynard, J. Soderqvist, M. Citterio, D. Fouchez, S. Nicoleau, B. Aubert, Didier Imbault, M. Mazzanti, A. Astbury, L. Labarga, J. Teiger, Irene Vichou, J. J. Veillet, J. Thion, J. David, Pierre Petroff, B. Merkel, Andrea Ferrari, Louis Fayard, P. d'Argent, D.V. Camin, D. M. Gingrich, J. Colas, Marzio Nessi, P. Roy, P. Kitching, Sylvain Tisserant, A. Miotto, Daniel Fournier, W. Richter, J. F. Renardy, F. Gianotti, P. Lavocat, Richard Keeler, J.P. Richer, J.C. Berset, L. Baisin, Patrick Fassnacht, J. S. White, Claude Leroy, J. F. Genat, Bruno Mansoulie, Paola Sala, P. Puzo, J-Y. Hostachy, I. Nikolic, C. Olivetto, N. L. Rodning, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), RD3, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Argon, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, chemistry.chemical_element, 7. Clean energy, 01 natural sciences, Particle identification, Particle detector, Calorimeter, Optics, chemistry, 0103 physical sciences, Measuring instrument, Angular resolution, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, 010306 general physics, business, Instrumentation, Image resolution
Abstract

This paper describes the construction of an integrated preshower within the RD3 liquid argon accordion calorimeter. It has a stereo view which enables the measurement of two transverse coordinates. The prototype was tested at CERN with electrons, photons and muons to validate its capability to work at LHC (Energy resolution, impact point resolution, angular resolution, π o γ rejection).

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