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897 results on '"Silarski M"'

251. Recent Experimental Results on the Low-energy $K^-$ Interaction with Nucleons by AMADEUS

Author

Del Grande, R., primary, Bazzi, M., additional, Bragadireanu, A.M., additional, Bosnar, D., additional, Cargnelli, M., additional, Curceanu, C., additional, De Paolis, L., additional, Fabbietti, L., additional, Fiorini, C., additional, Ghio, F., additional, Guaraldo, C., additional, Hayano, R.S., additional, Iliescu, M., additional, Iwasaki, M., additional, Levi Sandri, P., additional, Marton, J., additional, Miliucci, M., additional, Moskal, P., additional, Okada, S., additional, Piscicchia, K., additional, Ramos, A., additional, Scordo, A., additional, Silarski, M., additional, Sirghi, D.L., additional, Sirghi, F., additional, Skurzok, M., additional, Spallone, A., additional, Vazquez Doce, O., additional, Widmann, E., additional, Wycech, S., additional, and Zmeskal, J., additional

Published
2020
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253. Near threshold kaon-kaon interaction in the reactions e+ e- --> K+ K- gamma and e+ e- --> K0 K0bar gamma

Author

Lesniak, L., Sobczuk, F., Silarski, M., and Morawski, F.

Subjects
High Energy Physics - Phenomenology, High Energy Physics::Experiment
Abstract

Strong interactions between pairs of the K+ K- and K0 K0bar mesons can be studied in radiative decays of phi(1020) mesons. We present a theoretical model of the reactions e+ e- --> phi --> K+ K- gamma and e+ e- --> phi --> K0 K0bar gamma. The K+ K- and K0 K0bar effective mass dependence of the differential cross sections is derived. The total cross sections and the branching fractions for the two radiative phi decays are calculated., Comment: 4 pages, 3 figures, contribution to 15th International Workshop on Meson Physics, Cracow, Poland, 7th - 12th June 2018

Published
2018

254. Combination of KLOE σ (e + e − → π+π−γ(γ)) measurements and determination of <math> <msubsup> <mi>a</mi> <mi>μ</mi> <mrow> <msup> <mi>π</mi> <mo>+</mo> </msup> <msup> <mi>π</mi> <mo>−</mo> </msup> </mrow> </msubsup> </math> $$ {a}_{\mu}^{\pi^{+}{\pi}^{-}} $$ in the energy range 0.10 < s < 0.95 GeV2

Author

Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Balkeståhl, L., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwinski, E., D’Agostini, G., Danè, E., Leo, V., Lucia, E., Santis, A., Simone, P., Cicco, A., Domenico, A., Domenici, D., D’Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V., Johansson, T., Kang, X., Kisielewska-Kaminska, D., Kozyrev, E., Krzemien, W., Kupsc, A., Loffredo, S., Lukin, P., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Passeri, A., Patera, V., Rio, E., Raha, N., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E., Tortora, L., Venanzoni, G., Wislicki, W., Wolke, M., Keshavarzi, A., Müller, S.E., and Teubner, T.

Abstract

The three precision measurements of the cross section σ(e + e − → π + π −γ(γ)) using initial state radiation by the KLOE collaboration provide an important input for the prediction of the hadronic contribution to the anomalous magnetic moment of the muon. These measurements are correlated for both statistical and systematic uncertainties and, therefore, the simultaneous use of these measurements requires covariance matrices that fully describe the correlations. We present the construction of these covariance matrices and use them to determine a combined KLOE measurement for σ(e + e − → π + π −γ(γ)). We find, from this combination, a two-pion contribution to the muon magnetic anomaly in the energy range 0.10 < s < 0.95 GeV2 of a μ π + π − = 489.8 ± 1.7 stat ± 4.8 s y s × 10 − 10 $$ {a}_{\mu}^{\pi^{+}{\pi}^{-}}=\left(489.8\pm {1.7}_{\mathrm{stat}}\pm {4.8}_{\mathrm{sys}}\right)\times {10}^{-10} $$ .

Published
2018

255. Kaonic atoms measurements at the DAΦNE Collider

Author

Sirghi, Diana, primary, Amirkhani, A., additional, Baniahmad, A., additional, Bazzi, M., additional, Bellotti, G., additional, Berucci, C., additional, Bosnar, D., additional, Bragadireanu, M., additional, Cargnelli, M., additional, Curceanu, C., additional, Fabbietti, L., additional, Fiorini, C., additional, Ghio, F., additional, Guaraldo, C., additional, Iliescu, M., additional, Iwasaki, M., additional, Martona, J., additional, Miliucci, M., additional, Moskal, P., additional, Nied´zwiecki, S., additional, Okada, S., additional, Pietreanu, D., additional, Piscicchia, K., additional, Scordo, A., additional, Shi, H., additional, Silarski, M., additional, Sirghi, F., additional, Skurzok, M., additional, Spallone, A., additional, Tatsuno, H., additional, Widmann, E., additional, and Zmeskal, J., additional

Published
2019
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257. $$\hbox {K}^{-}$$ K - multi-nucleon absorption cross sections and branching ratios in $$\Lambda \hbox {p}$$ Λ p and $$\Sigma ^0\hbox {p}$$ Σ 0 p final states

Author

Del Grande, R., primary, Piscicchia, K., additional, Vazquez Doce, O., additional, Cargnelli, M., additional, Curceanu, C., additional, Fabbietti, L., additional, Marton, J., additional, Moskal, P., additional, Ramos, A., additional, Scordo, A., additional, Sirghi, D., additional, Skurzok, M., additional, Wycech, S., additional, Zmeskal, J., additional, Czerwinski, E., additional, De Leo, V., additional, Fermani, P., additional, Mandaglio, G., additional, Martini, M., additional, Raha, N., additional, Selce, A., additional, and Silarski, M., additional

Published
2019
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258. Synchronization and Calibration of the 24-Modules J-PET Prototype With 300-mm Axial Field of View.

Author

Moskal, P., Bednarski, T., Niedzwiecki, Sz., Silarski, M., Czerwinski, E., Kozik, T., Chhokar, J., Bala, M., Curceanu, C., Grande, R. Del, Dadgar, M., Dulski, K., Gajos, A., Gorgol, M., Gupta-Sharma, N., Hiesmayr, B. C., Jasinska, B., Kacprzak, K., Kaplon, L., and Karimi, H.

Subjects
POSITRON emission tomography, DATA acquisition systems, COINCIDENCE, CALIBRATION, PROTOTYPES, ATTENUATION of light
Abstract

Research conducted in the framework of the Jagiellonian-PET (J-PET) project aims to develop a cost-effective total-body positron emission tomography scanner. As a first step on the way to construct a full-scale J-PET tomograph from long strips of plastic scintillators, a 24-strip prototype was built and tested. The prototype consists of detection modules arranged axially forming a cylindrical diagnostic chamber with the inner diameter of 360 mm and the axial field-of-view of 300 mm. Promising perspectives for a low-cost construction of a total-body PET scanner are opened due to an axial arrangement of strips of plastic scintillators, which have a small light attenuation, superior timing properties, and the possibility of cost-effective increase of the axial field-of-view. The presented prototype comprises dedicated solely digital front-end electronic circuits and a triggerless data acquisition system which required the development of new calibration methods including time, thresholds, and gain synchronization. The system and elaborated calibration methods, including first results of the 24-module J-PET prototype, are presented and discussed. The achieved coincidence resolving time equals to ${\mathrm {CRT}}=490\pm 9$ ps. This value can be translated to the position reconstruction accuracy $\sigma (\Delta l) =18$ mm, which is fairly position independent. [ABSTRACT FROM AUTHOR]

Published
2021
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259. KLOE measurement of with Initial State Radiation and the contribution to the muon anomaly

Author

Lukin P. A., Antonelli A., Antonelli M., Archilli F., Balwierz I., Bencivenni G., Bini C., Bloise C., Bocchetta S., Bossi F., Branchini P., Capon G., Ceradini F., Ciambrone P., Czerwiński E., De Lucia E., De Santis A., De Simone P., De Zorzi G., Denig A., Di Domenico A., Di Donato C., Di Micco B., Dreucci M., Felici G., Fiore S., Franzini P., Gatti C., Gauzzi P., Giovannella S., Graziani E., Jacewicz M., Kluge W., Lee Franzini J., Lukin P., Martemianov M., Martini M., Meola S., Miscetti S., Morello G., Moulson M., Müller S., Nguyen, F., Palutan M., Passeri A., Patera V., Prado Longhi I., Santangelo P., Sciascia B., Silarski M., Spadaro T., Taccini C., Tortora L., Venanzoni G., Versaci R., Xu G., Zdebik J., Babusci D., Badoni D., Bocci V., Budano A., Bulychjev S. A., Caldeira Balkeståhl L., Campana P., Dané E., De Robertis G., Domenici D., Erriquez O., Fanizzi G., Giardina G., Gonnella F., Happacher F., Höistad B., Iafolla L., Iarocci E., Johansson T., Kowalewska A., Kulikov V., Kupsc A., Loddo F., Mandaglio G., Mascolo M., Matsyuk M., Messi R., Moricciani D., Ranieri A., Redmer C. F., Sarra I., Schioppa M., Sciubba A., Wiślicki W., Wolke M., AMBROSINO, FABIO, CAPUSSELA, TIZIANA, MASSAROTTI, PAOLO, NAPOLITANO, MARCO, Lukin, P. A., Ambrosino, Fabio, Antonelli, A., Antonelli, M., Archilli, F., Balwierz, I., Bencivenni, G., Bini, C., Bloise, C., Bocchetta, S., Bossi, F., Branchini, P., Capon, G., Capussela, Tiziana, Ceradini, F., Ciambrone, P., Czerwiński, E., De Lucia, E., De Santis, A., De Simone, P., De Zorzi, G., Denig, A., Di Domenico, A., Di Donato, C., Di Micco, B., Dreucci, M., Felici, G., Fiore, S., Franzini, P., Gatti, C., Gauzzi, P., Giovannella, S., Graziani, E., Jacewicz, M., Kluge, W., Lee Franzini, J., Lukin, P., Martemianov, M., Martini, M., Massarotti, Paolo, Meola, S., Miscetti, S., Morello, G., Moulson, M., Müller, S., Napolitano, Marco, Nguyen, F., Palutan, M., Passeri, A., Patera, V., Prado Longhi, I., Santangelo, P., Sciascia, B., Silarski, M., Spadaro, T., Taccini, C., Tortora, L., Venanzoni, G., Versaci, R., Xu, G., Zdebik, J., Babusci, D., Badoni, D., Bocci, V., Budano, A., Bulychjev, S. A., Caldeira Balkeståhl, L., Campana, P., Dané, E., De Robertis, G., Domenici, D., Erriquez, O., Fanizzi, G., Giardina, G., Gonnella, F., Happacher, F., Höistad, B., Iafolla, L., Iarocci, E., Johansson, T., Kowalewska, A., Kulikov, V., Kupsc, A., Loddo, F., Mandaglio, G., Mascolo, M., Matsyuk, M., Messi, R., Moricciani, D., Ranieri, A., Redmer, C. F., Sarra, I., Schioppa, M., Sciubba, A., Wiślicki, W., and Wolke, M.

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Muon, Photon, Luminosity (scattering theory), Pion, Electron–positron annihilation, Hadron, Form factor (quantum field theory), High Energy Physics::Experiment, Atomic and Molecular Physics, and Optics, Bhabha scattering
Abstract

The KLOE experiment at the ϕ – factory DAΦNE in Frascati near Rome is the first to have employed Initial State Radiation (ISR) to precisely determine the e + e − → π + π − ( γ ) cross section below 1 GeV. Such a measurement is particularly important to test the Standard Model (SM) calculation for the ( g − 2 ) of the muon, where a long standing 3 σ discrepancy is observed. In 2005 and 2008 KLOE published two measurements of the π + π − cross section with the photon emitted at small angles, and an independent measurement of the π + π − cross section with the photon emitted at large angles using data at a collision energy of 1 GeV (i.e., 20 MeV below the ϕ -peak) was published in 2010. While the measurements were normalized to the DAΦNE luminosity using large angle Bhabha scattering, a new analysis has been performed which derives the pion form factor directly from measuring the bin-by-bin π + π − γ / μ + μ − γ ratio. We present the preliminary results of this new measurement, as well as the previously published ones, and the impact on the evaluation of the hadronic contribution to the muon anomaly.

Published
2012
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260. Measurement of the charge asymmetry for the $K_{S} \rightarrow \pi e\nu$ decay and test of CPT symmetry with the KLOE detector

Author

Anastasi, A., Babusci, D., Berłowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Cao, B., Capon, G., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, E., D'Agostini, G., Danè, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kang, X., Kisielewska-Kamińska, D., Kozyrev, E. A., Krzemień, W., Kupść, A., Loffredo, S., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, P., Passeri, A., Patera, V., del Rio, E. Perez, Raha, N., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wiślicki, W., and Wolke, M.

Subjects
High Energy Physics - Experiment
Abstract

Using 1.63 fb$^{-1}$ of integrated luminosity collected by the KLOE experiment about $7\times 10^4$ $K_S \rightarrow \pi^{\pm}e^{\mp}\nu$ decays have been reconstructed. The measured value of the charge asymmetry for this decay is $A_S = (-4.9 \pm 5.7_{stat} \pm 2.6_{syst}) \times 10^{-3}$, which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives $A_S = (-3.8 \pm 5.0_{stat} \pm 2.6_{syst}) \times 10^{-3}$ and, together with the asymmetry of the $K_L$ semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance., Comment: submitted to JHEP

Published
2018

261. Measurement of the charge asymmetry for the $K_S \rightarrow ��e ��$ decay and test of CPT symmetry with the KLOE detector

Author

Anastasi, A., Babusci, D., Ber��owski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Cao, B., Capon, G., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwi��ski, E., D'Agostini, G., Dan��, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kang, X., Kisielewska-Kami��ska, D., Kozyrev, E. A., Krzemie��, W., Kup����, A., Loffredo, S., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, P., Passeri, A., Patera, V., del Rio, E. Perez, Raha, N., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wi��licki, W., and Wolke, M.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences
Abstract

Using 1.63 fb$^{-1}$ of integrated luminosity collected by the KLOE experiment about $7\times 10^4$ $K_S \rightarrow ��^{\pm}e^{\mp}��$ decays have been reconstructed. The measured value of the charge asymmetry for this decay is $A_S = (-4.9 \pm 5.7_{stat} \pm 2.6_{syst}) \times 10^{-3}$, which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives $A_S = (-3.8 \pm 5.0_{stat} \pm 2.6_{syst}) \times 10^{-3}$ and, together with the asymmetry of the $K_L$ semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance., submitted to JHEP

Published
2018
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262. Combination of KLOE sigma (e(+) e(-) -> pi(+)pi(-) gamma(gamma)) measurements and determination of a(mu)(pi+pi-) in the energy range 0.10 < s < 0.95 GeV2

Author

Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Balkeståhl, Li Caldeira, Cao, Bo, Ceradini, F., Ciambrone, P., Curciarello, F., Czerwinski, E., D'Agostini, G., Dane, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, Tord, Kang, X., Kisielewska-Kaminska, D., Kozyrev, E. A., Krzemien, W., Kupsc, Andrzej, Loffredo, S., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Passeri, A., Patera, V., del Rio, E. Perez, Raha, N., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wislicki, W., Wolke, Magnus, Keshavarzi, A., Mueller, S. E., and Teubner, T.

Subjects
Subatomär fysik, Astronomi, astrofysik och kosmologi, Subatomic Physics, Astronomy, Astrophysics and Cosmology, High Energy Physics::Experiment, e plus -e- Experiments
Abstract

The three precision measurements of the cross section sigma (e(+)e(-) -> pi(+)pi(-)gamma(gamma)) using initial state radiation by the KLOE collaboration provide an important input for the prediction of the hadronic contribution to the anomalous magnetic moment of the muon. These measurements are correlated for both statistical and systematic uncertainties and, therefore, the simultaneous use of these measurements requires covariance matrices that fully describe the correlations. We present the construction of these covariance matrices and use them to determine a combined KLOE measurement for sigma (e(+)e(-) -> pi(+)pi(-)gamma(gamma)). We find, from this combination, a two-pion contribution to the muon magnetic anomaly in the energy range 0.10 < s < 0.95 GeV2 of a(mu)(pi+pi-) (489.8 +/- 1.7(stat) +/- 4.8(sys)) x 10(-10).

Published
2018

263. Combination of KLOE σ (e + e − → π + π − ) measurements and determination of aμ π+π− in the energy range 0.10 < s < 0.95 GeV 2

Author

Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Balkeståhl, L. Caldeira, Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwinski, E., D’Agostini, G., Danè, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D’Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kang, X., Kisielewska-Kaminska, D., Kozyrev, E. A., Krzemien, W., Kupsc, A., Loffredo, S., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Passeri, A., Patera, V., del Rio, E. Perez, Raha, N., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wislicki, W., Wolke, M., Keshavarzi, A., Müller, S. E., and Teubner, T.

Subjects
e+-e- Experiments, Nuclear and High Energy Physics
Published
2018

264. Combined limit on the production of a light gauge boson decaying into $��^+��^-$ and $��^+��^-$

Author

2 Collaboration, Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwi��ski, E., D'Agostinio, G., Dan��, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kang, X., Kisielewska-Kami��ska, D., Kozyrev, E. A., Krzemien, W., Kupsc, A., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, P., Passeri, A., Patera, V., del Rio, E. Perez, Raha, N., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wi��licki, W., and Wolke, M.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, Nuclear Experiment
Abstract

We searched for the $��^+��^-$ decay of a light vector gauge boson, also known as dark photon, in the $e^+ e^- \to ��^+ ��^- ��_{\rm ISR}$ process by means of the Initial State Radiation (ISR) method. We used 1.93~fb$^{-1}$ of data collected by the KLOE experiment at the DA$��$NE $��$-factory. No structures have been observed over the irreducible $��^+ ��^-$ background. A 90\% CL limit on the ratio $\varepsilon^2=��^{\prime}/��$ between the dark coupling constant and the fine structure constant of $ 3\times 10^{-6}-2\times 10^{-7}$ has been set in the dark photon mass region between 519 MeV and 973 MeV. This new limit has been combined with the published result obtained investigating the hypothesis of the dark photon decaying into hadrons in $e^+ e^- \to ��^+ ��^- ��_{\rm ISR}$ events. The combined 90\% CL limit increases the sensitivity especially in the $��-��$ interference region and excludes $\varepsilon^2$ greater than $(13-2)\times 10^{-7}$. For dark photon masses greater than 600 MeV the combined limit is lower than 8~$\times\, 10^{-7}$ resulting more stringent than present constraints from other experiments., 7 pages, 9 figures, 1 table, accepted for publication in Physics Letters B

Published
2018
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265. Measurement of the absolute branching ratio of the K+→π+π−π+(γ) decay with the KLOE detector

Author

Babusci, D., Balwierz-Pytko, I., Bencivenni, G., Bloise, C., Bossi, F., Branchini, P., Budano, A., Caldeira Balkeståhl, L., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, E., Danè, E., De Leo, V., De Lucia, E., De Robertis, G., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Di Salvo, R., Domenici, D., Erriquez, O., Fanizzi, G., Fantini, A., Felici, G., Fiore, S., Franzini, P., Gajos, A., Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskjöld, L., Höistad, B., Johansson, T., Kamińska, D., Krzemien, W., Kupsc, A., Lee-Franzini, J., Loddo, F., Loffredo, S., Mandaglio, G., Martemianov, M., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Palladino, A., Passeri, A., Patera, V., Prado Longhi, I., Ranieri, A., Santangelo, P., Sarra, I., Schioppa, M., Sciascia, B., Silarski, M., Tortora, L., Venanzoni, G., Wiślicki, W., and Wolke, M.

Subjects
Nuclear and High Energy Physics
Published
2014
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267. Low energy antikaon-nucleon/nuclei interaction studies by AMADEUS

Author

Piscicchia, K., primary, Bazzi, M., additional, Belloti, G., additional, Bragadireanu, A. M., additional, Bosnar, D., additional, Butt, A. D., additional, Cargnelli, M., additional, Curceanu, C., additional, Del Grande, R., additional, De Paolis, L., additional, Fabbietti, L., additional, Fiorini, C., additional, Ghio, F., additional, Guaraldo, C., additional, Hayano, R. S., additional, Iliescu, M., additional, Iwasaki, M., additional, Sandri, P. Levi, additional, Marton, J., additional, Miliucci, M., additional, Moskal, P., additional, Okada, S., additional, Ramos, A., additional, Scordo, A., additional, Silarski, M., additional, Sirghi, D. L., additional, Sirghi, F., additional, Skurzok, M., additional, Spallone, A., additional, Doce, O. Vazquez, additional, Widmann, E., additional, Wycech, S., additional, and Zmeskal, J., additional

Published
2019
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269. A charged particle veto detector for kaonic deuterium measurements at DAΦNE

Author

Tüchler, M, primary, Zmeskal, J, additional, Amirkhani, A, additional, Bazzi, M, additional, Bellotti, G, additional, Berucci, C, additional, Bosnar, D, additional, Bragadireanu, A M, additional, Cargnelli, M, additional, Curceanu, C, additional, Dawood Butt, A, additional, Del Grande, R, additional, De Paolis, L, additional, Fabbietti, L, additional, Fiorini, C, additional, Ghio, F, additional, Guaraldo, C, additional, Hayano, R S, additional, Iliescu, M, additional, Iwasaki, M, additional, Sandri, P Levi, additional, Marton, J, additional, Miliucci, M, additional, Moskal, P, additional, Pietreanu, D, additional, Piscicchia, K, additional, Scordo, A, additional, Shi, H, additional, Silarski, M, additional, Sirghi, D, additional, Sirghi, F, additional, Skurzok, M, additional, Spallone, A, additional, Vazquez Doce, O, additional, and Widmann, E, additional

Published
2018
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270. Evaluation of Single-Chip, Real-Time Tomographic Data Processing on FPGA SoC Devices

Author

Korcyl, G., primary, Hiesmayr, B. C., additional, Jasinska, B., additional, Kacprzak, K., additional, Kajetanowicz, M., additional, Kisielewska, D., additional, Kowalski, P., additional, Kozik, T., additional, Krawczyk, N., additional, Krzemien, W., additional, Kubicz, E., additional, Bialas, P., additional, Mohammed, M., additional, Niedzwiecki, Sz., additional, Pawlik-Niedzwiecka, M., additional, Palka, M., additional, Raczynski, L., additional, Rajda, P., additional, Rudy, Z., additional, Salabura, P., additional, Sharma, N. G., additional, Sharma, S., additional, Curceanu, C., additional, Shopa, R. Y., additional, Skurzok, M., additional, Silarski, M., additional, Strzempek, P., additional, Wieczorek, A., additional, Wislicki, W., additional, Zaleski, R., additional, Zgardzinska, B., additional, Zielinski, M., additional, Moskal, P., additional, Czerwinski, E., additional, Dulski, K., additional, Flak, B., additional, Gajos, A., additional, Glowacz, B., additional, and Gorgol, M., additional

Published
2018
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271. The kaonic atoms research program at DAΦNE: overview and perspectives

Author

Curceanu, C, primary, Amirkhani, A, additional, Baniahmad, A, additional, Bazzi, M, additional, Bellotti, G, additional, Berucci, C, additional, Bosnar, D, additional, Bragadireanu, M, additional, Cargnelli, M, additional, Dawood Butt, A, additional, Del Grande, R, additional, Fabbietti, L, additional, Fiorini, C, additional, Ghio, F, additional, Guaraldo, C, additional, Iliescu, M, additional, Iwasaki, M, additional, Levi Sandri, P, additional, Marton, J, additional, Miliucci, M, additional, Moskal, P, additional, Niedźwiecki, S, additional, Okada, S, additional, Pietreanu, D, additional, Piscicchia, K, additional, Shi, H, additional, Silarski, M, additional, Sirghi, D, additional, Sirghi, F, additional, Skurzok, M, additional, Spallone, A, additional, Tatsuno, H, additional, Doce, O Vazquez, additional, Widmann, E, additional, and Zmeskal, J, additional

Published
2018
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273. Combined limit on the production of a light gauge boson decaying into μ+μ− and π+π−

Author

Anastasi, A., primary, Babusci, D., additional, Berlowski, M., additional, Bloise, C., additional, Bossi, F., additional, Branchini, P., additional, Budano, A., additional, Cao, B., additional, Ceradini, F., additional, Ciambrone, P., additional, Curciarello, F., additional, Czerwiński, E., additional, D'Agostini, G., additional, Danè, E., additional, De Leo, V., additional, De Lucia, E., additional, De Santis, A., additional, De Simone, P., additional, Di Cicco, A., additional, Di Domenico, A., additional, Domenici, D., additional, D'Uffizi, A., additional, Fantini, A., additional, Fantini, G., additional, Fermani, P., additional, Fiore, S., additional, Gajos, A., additional, Gauzzi, P., additional, Giovannella, S., additional, Graziani, E., additional, Ivanov, V.L., additional, Johansson, T., additional, Kang, X., additional, Kisielewska-Kamińska, D., additional, Kozyrev, E.A., additional, Krzemien, W., additional, Kupsc, A., additional, Lukin, P.A., additional, Mandaglio, G., additional, Martini, M., additional, Messi, R., additional, Miscetti, S., additional, Moricciani, D., additional, Moskal, P., additional, Passeri, A., additional, Patera, V., additional, Perez del Rio, E., additional, Raha, N., additional, Santangelo, P., additional, Schioppa, M., additional, Selce, A., additional, Silarski, M., additional, Sirghi, F., additional, Solodov, E.P., additional, Tortora, L., additional, Venanzoni, G., additional, Wiślicki, W., additional, and Wolke, M., additional

Published
2018
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274. Estimating the NEMA characteristics of the J-PET tomograph using the GATE package

Author

Kowalski, P, primary, Wiślicki, W, additional, Shopa, R Y, additional, Raczyński, L, additional, Klimaszewski, K, additional, Curcenau, C, additional, Czerwiński, E, additional, Dulski, K, additional, Gajos, A, additional, Gorgol, M, additional, Gupta-Sharma, N, additional, Hiesmayr, B, additional, Jasińska, B, additional, Kapłon, Ł, additional, Kisielewska-Kamińska, D, additional, Korcyl, G, additional, Kozik, T, additional, Krzemień, W, additional, Kubicz, E, additional, Mohammed, M, additional, Niedźwiecki, S, additional, Pałka, M, additional, Pawlik-Niedźwiecka, M, additional, Raj, J, additional, Rakoczy, K, additional, Rudy, Z, additional, Sharma, S, additional, Shivani, S, additional, Silarski, M, additional, Skurzok, M, additional, Zgardzińska, B, additional, Zieliński, M, additional, and Moskal, P, additional

Published
2018
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275. First measurement of the K−n →Λπ− non-resonant transition amplitude below threshold

Author

Piscicchia, K., primary, Wycech, S., additional, Fabbietti, L., additional, Cargnelli, M., additional, Curceanu, C., additional, Del Grande, R., additional, Marton, J., additional, Moskal, P., additional, Scordo, A., additional, Silarski, M., additional, Sirghi, D., additional, Skurzok, M., additional, Tucakovic, I., additional, Vázquez Doce, O., additional, Zmeskal, J., additional, Branchini, P., additional, Czerwinski, E., additional, De Leo, V., additional, De Lucia, E., additional, Di Cicco, A., additional, Fermani, P., additional, Fiore, S., additional, Krzemien, W., additional, Mandaglio, G., additional, Martini, M., additional, Perez del Rio, E., additional, and Selce, A., additional

Published
2018
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276. Status and Prospects of Discrete Symmetries Tests in Positronium Decays with the J-PET Detector.

Author

Silarski, M.

Subjects
DISCRETE symmetries, POSITRONIUM, TIME reversal, POSITRON emission, DETECTORS, MAGNITUDE (Mathematics)
Abstract

Positronium is a unique laboratory to study fundamental symmetries in the Standard Model, reflection in space (P), reversal in time (T), charge conjugation (C) and their combinations. The experimental limits on the C, CP and CPT symmetries violation in the decays of positronium are still several orders of magnitude higher than the expectations. The newly constructed Jagiellonian Positron Emission Tomograph (J-PET) was optimized for the registration of photons from the electron-positron annihilations. It enables tests of discrete symmetries in decays of positronium atoms via the determination of the expectation values of the discrete-symmetries-odd operators. In this article we present the capabilities of the J-PET detector in improving the current precision of discrete symmetries tests and report on the progress of analysis data from the first data-taking runs. [ABSTRACT FROM AUTHOR]

Published
2019
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277. This title is unavailable for guests, please login to see more information.

Author

Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Caldeira Balkeståhl, L., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, E., D’Agostini, G., Danè, E., Leo, V., Lucia, E., Santis, A., Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D’Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kisielewska-Kamińska, D., Kang, X., Kozyrev, E. A., Krzemien, W., Kupsc, A., Loffredo, S., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Passeri, A., Patera, V., Perez Del Rio, E., Raha, N., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wiślicki, W., Wolke, M., Keshavarzi, A., (0000-0001-6273-7102) Müller, S. E., Teubner, T., Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Caldeira Balkeståhl, L., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, E., D’Agostini, G., Danè, E., Leo, V., Lucia, E., Santis, A., Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D’Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, T., Kisielewska-Kamińska, D., Kang, X., Kozyrev, E. A., Krzemien, W., Kupsc, A., Loffredo, S., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Passeri, A., Patera, V., Perez Del Rio, E., Raha, N., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wiślicki, W., Wolke, M., Keshavarzi, A., (0000-0001-6273-7102) Müller, S. E., and Teubner, T.

Published
2018

278. Combined limit on the production of a light gauge boson decaying into mu(+) mu(-) and pi(+) pi(-)

Author

Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, R., Budano, A., Cao, Bo, Ceradini, F., Ciambrone, R., Curciarello, F., Czerwinski, E., D'Agostini, G., Dane, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, R., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fantini, G., Fermani, R., Fiore, S., Gajos, A., Gauzzi, R., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, Tord, Kang, X., Kisielewska-Kaminska, D., Kozyrev, E. A., Krzemien, W., Kupsc, Andrzej, Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, R., Passeri, A., Patera, V., del Rio, E. Perez, Raha, N., Santangelo, R., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wislicki, W., Wolke, Magnus, Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, R., Budano, A., Cao, Bo, Ceradini, F., Ciambrone, R., Curciarello, F., Czerwinski, E., D'Agostini, G., Dane, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, R., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fantini, G., Fermani, R., Fiore, S., Gajos, A., Gauzzi, R., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, Tord, Kang, X., Kisielewska-Kaminska, D., Kozyrev, E. A., Krzemien, W., Kupsc, Andrzej, Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, R., Passeri, A., Patera, V., del Rio, E. Perez, Raha, N., Santangelo, R., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wislicki, W., and Wolke, Magnus

Abstract

We searched for the mu(+) mu(-) decay of a light vector gauge boson, also known as dark photon, in the e(+) e(-) -> mu(+) mu(-) gamma(ISR) process by means of the Initial State Radiation (ISR) method. We used 1.93fb(-1) of data collected by the KLOE experiment at the DA Phi NE phi-factory. No structures have been observed over the irreducible mu(+) mu(-) background. A 90% CL limit on the ratio epsilon(2)= alpha'/alpha between the dark coupling constant and the fine structure constant of 3 x 10(-6)-2 x 10(-7) has been set in the dark photon mass region between 519 MeV and 973 MeV. This new limit has been combined with the published result obtained investigating the hypothesis of the dark photon decaying into hadrons in e(+) e(-) -> pi(+) pi(-) gamma(ISR) events. The combined 90% CL limit increases the sensitivity especially in the rho-omega interference region and excludes epsilon(2) greater than (13 - 2) x 10(-7). For dark photon masses greater than 600 MeV the combined limit is lower than 8 x 10(-7) resulting more stringent than present constraints from other experiments.

Published
2018
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279. Measurement of the charge asymmetry for the K-S -> pi e nu decay and test of CPT symmetry with the KLOE detector

Author

Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Cao, Bo, Capon, G., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwinski, E., D'Agostini, G., Dane, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, Tord, Kang, X., Kisielewska-Kaminska, D., Kozyrev, E. A., Krzemien, W., Kupsc, Andrzej, Loffredo, S., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, P., Passeri, A., Patera, V., del Rio, E. Perez, Raha, N., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wislicki, W., Wolke, Magnus, Anastasi, A., Babusci, D., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Cao, Bo, Capon, G., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwinski, E., D'Agostini, G., Dane, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Domenici, D., D'Uffizi, A., Fantini, A., Fantini, G., Fermani, P., Fiore, S., Gajos, A., Gauzzi, P., Giovannella, S., Graziani, E., Ivanov, V. L., Johansson, Tord, Kang, X., Kisielewska-Kaminska, D., Kozyrev, E. A., Krzemien, W., Kupsc, Andrzej, Loffredo, S., Lukin, P. A., Mandaglio, G., Martini, M., Messi, R., Miscetti, S., Moricciani, D., Moskal, P., Passeri, A., Patera, V., del Rio, E. Perez, Raha, N., Santangelo, P., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Solodov, E. P., Tortora, L., Venanzoni, G., Wislicki, W., and Wolke, Magnus

Abstract

Using 1.63 fb(-1) of integrated luminosity collected by the KLOE experiment about 7 x 10(4) K-S -> pi(+/-)e(-/+)nu decays have been reconstructed. The measured value of the charge asymmetry for this decay is A(S) = (-4.9 +/- 5.7(stat) +/- 2.6(syst)) x 10(-3) which is almost twice more precise than the previous KLOE result. The combination of these two measurements gives A(S) = (3.8 +/- 5.0(stat) +/- 2.6(syst)) x 10(-3) and, together with the asymmetry of the K-L semileptonic decay, provides significant tests of the CPT symmetry. The obtained results are in agreement with CPT invariance.

Published
2018
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280. Strong interaction between kaons in the reactions e+ e- --> K+ K- gamma and e+ e- --> K0 K0bar gamma

Author

Lesniak, L., Sobczuk, F., Silarski, M., Morawski, F., Lesniak, L., Sobczuk, F., Silarski, M., and Morawski, F.

Abstract

A theoretical model of the reactions e+ e- --> K+ K- gamma and e+ e- --> K0 K0bar gamma has been derived. The strong interaction between kaons is taken into account using a general form of the K Kbar scattering amplitude. It is shown that some models formulated in the past are particular cases of the present approach. The formulae for the K Kbar effective mass dependence of the differential cross section as well as for the angular kaon and photon distributions and for the branching fractions of the phi(1020)--> K+ K- gamma and phi(1020)--> K0 K0bar gamma decays have been obtained. We present numerical results for the functions entering into transition amplitudes, K Kbar effective mass distributions, total cross sections, and branching fractions. Finally, the model is generalized to treat other reactions with two pseudoscalar mesons accompanying a photon in the final state., Comment: 17 pages, 7 figures

Published
2018
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281. A feasibility study of the time reversal violation test based on polarization of annihilation photons from the decay of ortho-Positronium with the J-PET detector

Author

Raj, J., Gajos, A., Curceanu, C., Czerwinski, E., Dulski, K., Gorgol, M., Gupta-Sharma, N., Hiesmayr, B. C., Jasińska, B., Kacprzak, K., Kaplon, L., Kisielewska, D., Klimaszewski, K., Korcyl, G., Kowalski, P., Kozik, T., Krawczyk, N., Krzemien, W., Kubicz, E., Mohammed, M., Niedzwiecki, Sz., Palka, M., Pawlik-Niedzwiecka, M., Raczynski, L., Rakoczy, K., Rudy, Z., Sharma, S., Shivani, Shopa, R. Y., Silarski, M., Skurzok, M., Wislicki, W., Zgardzinska, B., Moskal, P., Raj, J., Gajos, A., Curceanu, C., Czerwinski, E., Dulski, K., Gorgol, M., Gupta-Sharma, N., Hiesmayr, B. C., Jasińska, B., Kacprzak, K., Kaplon, L., Kisielewska, D., Klimaszewski, K., Korcyl, G., Kowalski, P., Kozik, T., Krawczyk, N., Krzemien, W., Kubicz, E., Mohammed, M., Niedzwiecki, Sz., Palka, M., Pawlik-Niedzwiecka, M., Raczynski, L., Rakoczy, K., Rudy, Z., Sharma, S., Shivani, Shopa, R. Y., Silarski, M., Skurzok, M., Wislicki, W., Zgardzinska, B., and Moskal, P.

Abstract

The Jagiellonian Positron Emission Tomograph (J-PET) is a novel de- vice being developed at Jagiellonian University in Krakow, Poland based on or- ganic scintillators. J-PET is an axially symmetric and high acceptance scanner that can be used as a multi-purpose detector system. It is well suited to pur- sue tests of discrete symmetries in decays of positronium in addition to medical imaging. J-PET enables the measurement of both momenta and the polarization vectors of annihilation photons. The latter is a unique feature of the J-PET detector which allows the study of time reversal symmetry violation operator which can be constructed solely from the annihilation photons momenta before and after the scattering in the detector.

Published
2018
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282. Feasibility study of the time reversal symmetry tests in decays of metastable positronium atoms with the J-PET detector

Author

Gajos, A., Curceanu, C., Czerwiński, E., Dulski, K., Gorgol, M., Gupta-Sharma, N., Hiesmayr, B. C., Jasińska, B., Kacprzak, K., Kapłon, Ł., Kisielewska, D., Korcyl, G., Kowalski, P., Kozik, T., Krzemień, W., Kubicz, E., Mohammed, M., Niedźwiecki, Sz., Pałka, M., Pawlik-Niedźwiecka, M., Raczyński, L., Raj, J., Rudy, Z., Sharma, S., Shivani, Shopa, R., Silarski, M., Skurzok, M., Wiślicki, W., Zgardzińska, B., Zieliński, M., Moskal, P., Gajos, A., Curceanu, C., Czerwiński, E., Dulski, K., Gorgol, M., Gupta-Sharma, N., Hiesmayr, B. C., Jasińska, B., Kacprzak, K., Kapłon, Ł., Kisielewska, D., Korcyl, G., Kowalski, P., Kozik, T., Krzemień, W., Kubicz, E., Mohammed, M., Niedźwiecki, Sz., Pałka, M., Pawlik-Niedźwiecka, M., Raczyński, L., Raj, J., Rudy, Z., Sharma, S., Shivani, Shopa, R., Silarski, M., Skurzok, M., Wiślicki, W., Zgardzińska, B., Zieliński, M., and Moskal, P.

Abstract

This article reports on the feasibility of testing of the symmetry under reversal in time in a purely leptonic system constituted by positronium atoms using the J-PET detector. The present state of T symmetry tests is discussed with an emphasis on the scarcely explored sector of leptonic systems. Two possible strategies of searching for manifestations of T violation in non-vanishing angular correlations of final state observables in the decays of metastable triplet states of positronium available with J-PET are proposed and discussed. Results of a pilot measurement with J-PET and assessment of its performance in reconstruction of three-photon decays are shown along with an analysis of its impact on the sensitivity of the detector for the determination of T -violation sensitive observables., Comment: 15 pages, 9 figures. Submitted to Advances in High Energy Physics

Published
2018

283. Measurement of the running of the fine structure constant below 1 GeV with the KLOE detector-2

Author

Jegerlehner, Fred, Anastasi, A., Babusci, D., Bencivenni, G., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Caldeira Balkeståhl, L., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, E., D'Agostini, G., Dané, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Di Salvo, R., Domenici, D., D'Uffizi, A., Fantini, A., Felici, G., Fiore, S., Gajos, A., Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskjöld, L., Johansson, T., Kamińska, D., Krzemien, W., Kupsc, A., Loffredo, S., Lukin, P. A., Mandaglio, G., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Papenbrock, M., Passeri, A., Patera, V., Perez Del Rio, E., Ranieri, A., Santangelo, P., Sarra, I., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Tortora, L., Venanzoni, G., Wiślicki, W., and Wolke, M.

Abstract

Physics letters / B 767, 485 - 492 (2017). doi:10.1016/j.physletb.2016.12.016, We have measured the running of the effective QED coupling constant $\alpha(s)$ in the time-like region $0.6, Published by North-Holland Publ., Amsterdam

Published
2017
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284. Measurement of the running of the fine structure constant below 1 GeV with the KLOE detector

Author

Collaboration, The KLOE-2, Anastasi, A., Babusci, D., Bencivenni, G., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Balkeståhl, L. Caldeira, Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, E., D'Agostini, G., Dané, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Di Salvo, R., Domenici, D., D'Uffizi, A., Fantini, A., Felici, G., Fiore, S., Gajos, A., Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskjöld, L., Johansson, T., Kamińska, D., Krzemien, W., Kupsc, A., Loffredo, S., Lukin, P. A., Mandaglio, G., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Papenbrock, M., Passeri, A., Patera, V., del Rio, E. Perez, Ranieri, A., Santangelo, P., Sarra, I., Schioppa, M., Selce, A., Silarski, M., Sirghi, F., Tortora, L., Venanzoni, G., Wiślicki, W., Wolke, M., Jegerlehner, F., Anastasi, A, Ceradini, Filippo, DI CICCO, Alessandro, and Loffredo, Salvatore

Subjects
Nuclear and High Energy Physics, α running, Electron–positron annihilation, Hadron, FOS: Physical sciences, 01 natural sciences, Settore FIS/04 - Fisica Nucleare e Subnucleare, High Energy Physics - Experiment, Subatomär fysik, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), Subatomic Physics, 0103 physical sciences, Physics::Atomic Physics, Vacuum polarization, 010306 general physics, Physics, Coupling constant, 010308 nuclear & particles physics, Branching fraction, High Energy Physics::Phenomenology, Detector, Fine-structure constant, lcsh:QC1-999, High Energy Physics - Phenomenology, arunning, High Energy Physics::Experiment, lcsh:Physics, Lepton
Abstract

We have measured the running of the effective QED coupling constant $\alpha(s)$ in the time-like region $0.6, Comment: 19 pages, 8 figures, version accepted for publication in Phys. Lett. B

Published
2016

285. Limit on the production of a new vector boson in $\mathrm{e^+ e^-}\rightarrow {\rm U}\gamma$, U$\rightarrow \pi^+\pi^-$ with the KLOE experiment

Author

Collaboration, KLOE-2, Anastasi, A., Babusci, D., Bencivenni, G., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Balkeståhl, L. Caldeira, Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwinski, E., D'Agostini, G., Danè, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Di Salvo, R., Domenici, D., D'Uffizi, A., Fantini, A., Felici, G., Fiore, S., Gajos, A., Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskjöld, L., Andersson, W. Ikegami, Johansson, T., Kamińska, D., Krzemien, W., Kupsc, A., Loffredo, S., Mandaglio, G., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Palladino, A., Papenbrock, M., Passeri, A., Patera, V., del Rio, E. Perez, Ranieri, A., Santangelo, P., Sarra, I., Schioppa, M., Silarski, M., Sirghi, F., Tortora, L., Venanzoni, G., Wiślicki, W., and Wolke, M.

Subjects
High Energy Physics - Experiment
Abstract

The recent interest in a light gauge boson in the framework of an extra U(1) symmetry motivates searches in the mass range below 1 GeV. We present a search for such a particle, the dark photon, in ${\rm e^+ e^-}\rightarrow {\rm U}\gamma$, U$\rightarrow \pi^+\pi^-$ based on 28 million $\mathrm{e^+ e^-} \rightarrow \pi^+ \pi^-\gamma$ events collected at DA$\Phi$NE by the KLOE experiment. The $\pi^+ \pi^-$ production by initial-state radiation compensates for a loss of sensitivity of previous KLOE ${\rm U} \rightarrow \mathrm{e^+ e^-}$, $\mu^+\mu^-$ searches due to the small branching ratios in the $\rho-\omega$ resonance region. We found no evidence for a signal and set a limit at 90\% CL on the mixing strength between the photon and the dark photon, $\varepsilon^2$, in the U mass range between $527$ and $987$~MeV. Above 700 MeV this new limit is more stringent than previous ones., Comment: 6 pages, 9 figures, 1 table, submitted to Phys. Lett. B

Published
2016

286. Low Energy Antikaon--Nucleon/Nuclei Interaction Studies by AMADEUS

Author

Piscicchia, K., primary, Cargnelli, M., additional, Curceanu, C., additional, Del Grande, R., additional, Fabbietti, L., additional, Guaraldo, C., additional, Marton, J., additional, Moskal, P., additional, Scordo, A., additional, Silarski, M., additional, Sirghi, D., additional, Skurzok, M., additional, Tucakovic, I., additional, Vazquez Doce, O., additional, Wycech, S., additional, Widmann, E., additional, and Zmeskal, J., additional

Published
2018
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287. Low energy interaction studies of negative kaons in light nuclear targets by AMADEUS

Author

Piscicchia, K., primary, Bazzi, M., additional, Belloti, G., additional, Bragadireanu, A. M., additional, Bosnar, D., additional, Butt, A. D., additional, Cargnelli, M., additional, Curceanu, C., additional, Del Grande, R., additional, De Paolis, L., additional, Fabbietti, L., additional, Fiorini, C., additional, Ghio, F., additional, Guaraldo, C., additional, Hayano, R. S, additional, Iliescu, M., additional, Iwasaki, M., additional, Levi Sandri, P., additional, Marton, J., additional, Miliucci, M., additional, Moskal, P., additional, Okada, S., additional, Pietreanu, D., additional, Scordo, A., additional, Silarski, M., additional, Sirghi, D. L., additional, Sirghi, F., additional, Skurzok, M., additional, Spallone, A., additional, Vazquez Doce, O., additional, Widmann, E., additional, Wycech, S., additional, and Zmeskal, J., additional

Published
2018
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288. The kaonic atoms research program at DAΦNE: from SIDDHARTA to SIDDHARTA-2

Author

Scordo, A., primary, Amirkhani, A., additional, Bazzi, M., additional, Bellotti, G., additional, Berucci, C., additional, Bosnar, D., additional, Bragadireanu, A.M., additional, Cargnelli, M., additional, Curceanu, C., additional, Dawood Butt, A., additional, Del Grande, R., additional, Fabbietti, L., additional, Fiorini, C., additional, Ghio, F., additional, Guaraldo, C., additional, Hayano, R.S., additional, Iliescu, M., additional, Iwasaki, M., additional, Levi Sandri, P., additional, Marton, J., additional, Miliucci, M., additional, Moskal, P., additional, Pietreanu, D., additional, Piscicchia, K., additional, Shi, H., additional, Silarski, M., additional, Sirghi, D., additional, Sirghi, F., additional, Skurzok, M., additional, Spallone, A., additional, Tatsuno, H., additional, Vazquez Doce, O., additional, Widmann, E., additional, and Zmeskal, J., additional

Published
2018
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289. Studies of low-energy K- nuclear interactions by AMADEUS

Author

Del Grande, R., primary, Bazzi, M., additional, Belloti, G., additional, Bragadireanu, A.M., additional, Bosnar, D., additional, Butt, A.D., additional, Cargnelli, M., additional, Curceanu, C., additional, De Paolis, L., additional, Fabbietti, L., additional, Fiorini, C., additional, Ghio, F., additional, Guaraldo, C., additional, Hayano, R.S., additional, Iliescu, M., additional, Iwasaki, M., additional, Levi Sandri, P., additional, Marton, J., additional, Miliucci, M., additional, Moskal, P., additional, Okada, S., additional, Pietreanu, D., additional, Piscicchia, K., additional, Scordo, A., additional, Shi, H., additional, Silarski, M., additional, Sirghi, D.L., additional, Sirghi, F., additional, Skurzok, M., additional, Spallone, A., additional, Vazquez Doce, O., additional, Widmann, E., additional, Wycech, S., additional, and Zmeskal, J., additional

Published
2018
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290. Search for Deeply Bound Kaonic Nuclear States in the AMADEUS Experiment

Author

Skurzok, M., primary, Cargnelli, M., additional, Curceanu, C., additional, Del Grande, Raffaele, additional, Fabbietti, L., additional, Guaraldo, C., additional, Marton, J., additional, Moskal, P., additional, Piscicchia, K., additional, Scordo, A., additional, Silarski, M., additional, Sirghi, D.L., additional, Tucakovic, I., additional, Vazquez Doce, O., additional, Wycech, S., additional, Widmann, E., additional, and Zmeskal, J., additional

Published
2018
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291. Test of CPT and Lorentz symmetry in entangled neutral kaons with the KLOE experiment

Author

Babusci, D., Balwierz Pytko, I., Bencivenni, G., Bloise, C., Bossi, F., Branchini, P., Budano, A., Caldeira Balkestahl, L., Balkestahl, L. C., Caldeirabalkestahl, L., Capon, G., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwin Ski, E., Czerwinski, E., Dane, E., Da Ne, E., De Leo, V., De Lucia, E., De Robertis, G., DE SANTIS, Antonio, De Simone, P., Desimone, P., Di Cicco, A., DI DOMENICO, Antonio, Di Donato, C., Di Salvo, R., Domenici, D., Do Menici, D., Erriquez, O., Fanizzi, G., Fantini, A., Felici, G., Fiore, Salvatore, Franzini, Paolo, Gajos, A., Gauzzi, Paolo, Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskjold, L., Hoistad, B., Jacewicz, M., Johansson, T., Kacprzak, K., Kaminska, G. D., Kupsc, A., Lee Franzini, J., Loddo, F., Loffredo, S., Mandaglio, G., Martemianov, M., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, R., Moskal, P., Nguyen, F., Palladino, A., Passeri, A., Patera, Vincenzo, Prado Longhi, I., Longhi, I. P., Pradolonghi, I., Ranieri, A., Santangelo, R., Santangelo, P., Sarra, I., Schioppa, M., Sciascia, B., Silarski, M., Taccini, C., Tortora, L., Venanzoni, G., Wis ́licki, W., Wislicki, W., Wolke, M., Zdebik, J., Babusci, D., Balwierz Pytko, I., Bencivenni, G., Bloise, C., Bossi, F., Branchini, P., Budano, A., Caldeira Balkestahl, L., Capon, G., Ceradini, Filippo, Ciambrone, P., Curciarello, F., Czerwinski, E., Danè, E., De Leo, V., De Lucia, E., De Robertis, G., De Santis, A., De Simone, P., DI CICCO, Alessandro, Di Domenico, A., Di Donato, C., Di Salvo, R., Domenici, D., Erriquez, O., Fanizzi, G., Fantini, A., Felici, G., Fiore, S., Franzini, P., Gajos, A., Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskjold, L., Hoistad, B., Jacewicz, M., Johansson, T., Kacprzak, K., Kaminska, D., Kupsc, A., Lee Franzini, J., Loddo, F., Loffredo, Salvatore, Mandaglio, G., Martemianov, M., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Nguyen, F., Palladino, A., Passeri, A., Patera, V., PRADO LONGHI, Ivan, Ranieri, A., Santangelo, P., Sarra, I., Schioppa, M., Sciascia, B., Silarski, M., Taccini, Cecilia, Tortora, L., Venanzoni, G., Wislicki, W., Wolke, M., and Zdebik, J.

Subjects
Quark, Particle physics, Nuclear and High Energy Physics, lorentz symmetry, CPT symmetry, Electron–positron annihilation, Physics beyond the Standard Model, FOS: Physical sciences, Context (language use), Lorentz covariance, $\phi$ -Factory, 01 natural sciences, High Energy Physics - Experiment, cpt symmetry, Nuclear physics, High Energy Physics - Experiment (hep-ex), Standard-Model Extension, 0103 physical sciences, φ-Factory, Lorentz symmetry, Neutral kaons, neutral kaons, 010306 general physics, Nuclear Experiment, Physics, ϕ-Factory, Settore FIS/01, 010308 nuclear & particles physics, phi-factory, 3. Good health, φ-factory, CP violation, High Energy Physics::Experiment
Abstract

Neutral kaon pairs produced in phi decays in anti-symmetric entangled state can be exploited to search for violation of CPT symmetry and Lorentz invariance. We present an analysis of the CP-violating process phi->K_S K_L->pi+pi-pi+pi- based on 1.7 fb-1 of data collected by the KLOE experiment at the Frascati phi-factory DAFNE. The data are used to perform a measurement of the CPT-violating parameters Delta_amu for neutral kaons in the contest of the Standard Model Extension framework. The parameters measured in the reference frame of the fixed stars are: Delta_ao = (-6.0 +- 7.7_{stat} +- 3.1_{syst}) x 10^{-18} GeV Delta_ax = ( 0.9 +- 1.5_{stat} +- 0.6_{syst}) x 10^{-18} GeV Delta_ay = (-2.0 +- 1.5_{stat} +- 0.5_{syst}) x 10^{-18} GeV Delta_az = ( 3.1 +- 1.7_{stat} +- 0.5_{syst}) x 10^{-18} GeV These are presently the most precise measurements in the quark sector of the Standard Model Extension., 16 pages, 6 figures, added few typo corrections

Published
2014

292. Scatter fraction of the J-PET tomography scanner

Author

Kowalski, P., Wiślicki, W., Raczyński, L., Alfs, D., Bednarski, T., Białas, P., Czerwiński, E., Gajos, A., Głowacz, B., Jasińska, J., Kamińska, D., Korcyl, G., Kozik, T., Krzemień, W., Kubicz, E., Mohammad, M., Niedźwiecki, Sz., Pałka, M., Pawlik-Niedźwiecka, M., Rudy, Z., Silarski, M., Smyrski, J., Strzelecki, A., Wieczorek, A., Zgardzińska, B., Zieliński, M., and Moskal, P.

Subjects
Physics, Scanner, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Physics::Medical Physics, General Physics and Astronomy, FOS: Physical sciences, Scatter fraction, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, Physics - Medical Physics, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, 0103 physical sciences, Tomography, Medical Physics (physics.med-ph), Nuclear medicine, business
Abstract

A novel Positron Emission Tomography system, based on plastic scintillators, is being developed by the J-PET collaboration. In this article we present the simulation results of the scatter fraction, representing one of the parameters crucial for background studies defined in the NEMA-NU-2-2012 norm. We elaborate an event selection methods allowing to suppress events in which gamma quanta were scattered in the phantom or underwent the multiple scattering in the detector. The estimated scatter fraction for the single-layer J-PET scanner varies from 37% to 53% depending on the applied energy threshold., 14 pages, 5 figures

Published
2016

293. Precision measurement of the $\eta\to\pi^+\pi^-\pi^0$ Dalitz plot distribution with the KLOE detector

Author

Collaboration, KLOE-2, Anastasi, A., Babusci, D., Bencivenni, G., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Balkeståhl, L. Caldeira, Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, E., D'Agostini, G., Dané, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Di Salvo, R., Domenici, D., D'Uffizi, A., Fantini, A., Felici, G., Fiore, S., Gajos, A., Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskjöld, L., Andersson, W. Ikegami, Johansson, T., Kamińska, D., Krzemien, W., Kupsc, A., Loffredo, S., Mandaglio, G., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Papenbrock, M., Passeri, A., Patera, V., del Rio, E. Perez, Ranieri, A., Santangelo, P., Sarra, I., Schioppa, M., Silarski, M., Sirghi, F., Tortora, L., Venanzoni, G., Wiślicki, W., and Wolke, M.

Subjects
High Energy Physics::Experiment, Nuclear Experiment, High Energy Physics - Experiment
Abstract

Using $1.6$ fb$^{-1}$ of $e^+ e^-\to\phi\to\eta\gamma$ data collected with the KLOE detector at DA$\Phi$NE, the Dalitz plot distribution for the $\eta \to \pi^+ \pi^- \pi^0$ decay is studied with the world's largest sample of $\sim 4.7 \cdot 10^6$ events. The Dalitz plot density is parametrized as a polynomial expansion up to cubic terms in the normalized dimensionless variables $X$ and $Y$. The experiment is sensitive to all charge conjugation conserving terms of the expansion, including a $gX^2Y$ term. The statistical uncertainty of all parameters is improved by a factor two with respect to earlier measurements., Comment: 11 pages, 9 figures, supplement: an ascii table

Published
2016

294. Measurement of the $��\to ��^0 e^+e^-$ transition form factor with the KLOE detector

Author

2 Collaboration, Anastasi, A., Babusci, D., Bencivenni, G., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Balkest��hl, L. Caldeira, Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwi��ski, E., D'Agostini, G., Dan��, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Di Salvo, R., Domenici, D., D'Uffizi, A., Fantini, A., Felici, G., Fiore, S., Gajos, A., Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskj��ld, L., Andersson, W. Ikegami, Johansson, T., Kami��ska, D., Krzemien, W., Kupsc, A., Loffredo, S., Mandaglio, G., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Papenbrock, M., Passeri, A., Patera, V., del Rio, E. Perez, Ranieri, A., Santangelo, P. Salabura P., Sarra, I., Schioppa, M., Silarski, M., Sirghi, F., Tortora, L., Venanzoni, G., Wi��licki, W., and Wolke, M.

Subjects
High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), FOS: Physical sciences
Abstract

A measurement of the vector to pseudoscalar conversion decay $��\to ��^0 e^+e^-$ with the KLOE experiment is presented. A sample of $\sim 9500$ signal events was selected from a data set of 1.7 fb$^{-1}$ of $e^+e^-$ collisions at $\sqrt{s} \sim m_��$ collected at the DA$��$NE $e^+e^-$ collider. These events were used to obtain the first measurement of the transition form factor $| F_{����^0}(q^2) |$ and a new measurement of the branching ratio of the decay: $\rm{BR}\,(��\to ��^0 e^+e^-) = (\,1.35 \pm 0.05^{\,\,+0.05}_{\,\,-0.10}\,) \times 10 ^{-5}$. The result improves significantly on previous measurements and is in agreement with theoretical predictions., 13 pages, 4 figures; matches published version

Published
2016
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295. Precision measurement of the $\eta \rightarrow \pi^{+}\pi^{-}\pi^{0}$ Dalitz plot distribution with the KLOE detector

Author

Anastasi, A., Babusci, D., Bencivenni, G., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Balkeståhl, L. Caldeira, Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, Eryk, D’Agostini, G., Danè, E., Leo, V. De, Lucia, E. De, Santis, A. De, Simone, P. De, Cicco, A. Di, Domenico, A. Di, Salvo, R. Di, Domenici, D., D’Uffizi, A., Fantini, A., Felici, G., Fiore, S., Gajos, Aleksander, Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskjöld, L., Andersson, W. Ikegami, Johansson, T., Kisielewska, Daria, Krzemień, Wojciech, Kupsc, A., Loffredo, S., Mandaglio, G., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, Paweł, Papenbrock, M., Passeri, A., Patera, V., Perez del Rio, Elena, Ranieri, A., Santangelo, P., Sarra, I., Schioppa, M., Silarski, M., Sirghi, F., Tortora, L., Venanzoni, G., Wislicki, W., and Wolke, M.

Subjects
e+-e- experiments, QCD
Published
2016

296. Limit on the production of a new vector boson in $e^{+}e^{-} \rightarrow U\gamma$, $U\rightarrow \pi^{+}\pi^{-}$ with the KLOE experiment

Author

Anastasi, A., Babusci, D., Bencivenni, G., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Caldeira Balkeståhl, L., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, Eryk, D'Agostini, G., Danè, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Di Salvo, R., Domenici, D., D'Uffizi, A., Fantini, A., Felici, G., Fiore, S., Gajos, Aleksander, Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskjöld, L., Ikegami Andersson, W., Johansson, T., Kisielewska, Daria, Krzemień, Wojciech, Kupsc, A., Loffredo, S., Mandaglio, G., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, Paweł, Palladino, A., Papenbrock, M., Passeri, A., Patera, V., Perez del Rio, Elena, Ranieri, A., Santangelo, P., Sarra, I., Schioppa, M., Silarski, M., Sirghi, F., Tortora, L., Venanzoni, G., Wiślicki, W., and Wolke, M.

Subjects
dark photon, dark forces, U boson, dark matter
Published
2016

297. Precision measurement of the $��\to��^+��^-��^0$ Dalitz plot distribution with the KLOE detector

Author

2 Collaboration, Anastasi, A., Babusci, D., Bencivenni, G., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Balkest��hl, L. Caldeira, Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwi��ski, E., D'Agostini, G., Dan��, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Di Salvo, R., Domenici, D., D'Uffizi, A., Fantini, A., Felici, G., Fiore, S., Gajos, A., Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskj��ld, L., Andersson, W. Ikegami, Johansson, T., Kami��ska, D., Krzemien, W., Kupsc, A., Loffredo, S., Mandaglio, G., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Papenbrock, M., Passeri, A., Patera, V., del Rio, E. Perez, Ranieri, A., Santangelo, P., Sarra, I., Schioppa, M., Silarski, M., Sirghi, F., Tortora, L., Venanzoni, G., Wi��licki, W., and Wolke, M.

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex)
Abstract

Using $1.6$ fb$^{-1}$ of $e^+ e^-\to��\to����$ data collected with the KLOE detector at DA$��$NE, the Dalitz plot distribution for the $��\to ��^+ ��^- ��^0$ decay is studied with the world's largest sample of $\sim 4.7 \cdot 10^6$ events. The Dalitz plot density is parametrized as a polynomial expansion up to cubic terms in the normalized dimensionless variables $X$ and $Y$. The experiment is sensitive to all charge conjugation conserving terms of the expansion, including a $gX^2Y$ term. The statistical uncertainty of all parameters is improved by a factor two with respect to earlier measurements., 11 pages, 9 figures, supplement: an ascii table

Published
2016
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298. Measurement of the $\phi \rightarrow \pi^{0}e^{+}e^{-}$ transition form factor with the KLOE detector

Author

Anastasi, A., Babusci, D., Bencivenni, G., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Caldeira Balkeståhl, L., Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwiński, Eryk, D'Agostini, G., Danè, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Di Salvo, R., Domenici, D., D'Uffizi, A., Fantini, A., Felici, G., Fiore, S., Gajos, Aleksander, Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskjöld, L., Ikegami Andersson, W., Johansson, T., Kisielewska, Daria, Krzemień, Wojciech, Kupsc, A., Loffredo, S., Mandaglio, G., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, Paweł, Papenbrock, M., Passeri, A., Patera, V., Perez del Rio, Elena, Ranieri, A., Salabura, Piotr, Santangelo, P., Sarra, I., Schioppa, M., Silarski, M., Sirghi, F., Tortora, L., Venanzoni, G., Wiślicki, W., and Wolke, M.

Subjects
conversion decay, $e^{+}e^{−}$ collisions, transition form factor
Published
2016

299. Limit on the production of a new vector boson in $\mathrm{e^+ e^-}\rightarrow {\rm U}��$, U$\rightarrow ��^+��^-$ with the KLOE experiment

Author

2 Collaboration, Anastasi, A., Babusci, D., Bencivenni, G., Berlowski, M., Bloise, C., Bossi, F., Branchini, P., Budano, A., Balkest��hl, L. Caldeira, Cao, B., Ceradini, F., Ciambrone, P., Curciarello, F., Czerwinski, E., D'Agostini, G., Dan��, E., De Leo, V., De Lucia, E., De Santis, A., De Simone, P., Di Cicco, A., Di Domenico, A., Di Salvo, R., Domenici, D., D'Uffizi, A., Fantini, A., Felici, G., Fiore, S., Gajos, A., Gauzzi, P., Giardina, G., Giovannella, S., Graziani, E., Happacher, F., Heijkenskj��ld, L., Andersson, W. Ikegami, Johansson, T., Kami��ska, D., Krzemien, W., Kupsc, A., Loffredo, S., Mandaglio, G., Martini, M., Mascolo, M., Messi, R., Miscetti, S., Morello, G., Moricciani, D., Moskal, P., Palladino, A., Papenbrock, M., Passeri, A., Patera, V., del Rio, E. Perez, Ranieri, A., Santangelo, P., Sarra, I., Schioppa, M., Silarski, M., Sirghi, F., Tortora, L., Venanzoni, G., Wi��licki, W., and Wolke, M.

Subjects
High Energy Physics - Experiment (hep-ex), High Energy Physics::Phenomenology, FOS: Physical sciences
Abstract

The recent interest in a light gauge boson in the framework of an extra U(1) symmetry motivates searches in the mass range below 1 GeV. We present a search for such a particle, the dark photon, in ${\rm e^+ e^-}\rightarrow {\rm U}��$, U$\rightarrow ��^+��^-$ based on 28 million $\mathrm{e^+ e^-} \rightarrow ��^+ ��^-��$ events collected at DA$��$NE by the KLOE experiment. The $��^+ ��^-$ production by initial-state radiation compensates for a loss of sensitivity of previous KLOE ${\rm U} \rightarrow \mathrm{e^+ e^-}$, $��^+��^-$ searches due to the small branching ratios in the $��-��$ resonance region. We found no evidence for a signal and set a limit at 90\% CL on the mixing strength between the photon and the dark photon, $\varepsilon^2$, in the U mass range between $527$ and $987$~MeV. Above 700 MeV this new limit is more stringent than previous ones., 6 pages, 9 figures, 1 table, submitted to Phys. Lett. B

Published
2016
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300. Determination of the 3��fraction from positron annihilation in mesoporous materials for symmetry violation experiment with J-PET scanner

Author

Jasi��ska, B., Gorgol, M., Wiertel, M., Zaleski, R., Alfs, D., Bednarski, T., Bia��as, P., Czerwi��ski, E., Dulski, K., Gajos, A., G��owacz, B., Kami��ska, D., Kap��on, ��., Korcyl, G., Kowalski, P., Kozik, T., Krzemie��, W., Kubicz, E., Mohammed, M., Nied��wiecki, Sz., Pa��ka, M., Raczy��ski, L., Rudy, Z., Rundel, O., Sharma, N. G., Silarski, M., S��omski, A., Strzelecki, A., Wieczorek, A., Wi��licki, W., Zgardzi��ska, B., Zieli��ski, M., and Moskal, P.

Subjects
FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex)
Abstract

Various mesoporous materials were investigated to choose the best material for experiments requiring high yield of long-lived positronium. We found that the fraction of 3��annihilation determined using ��-ray energy spectra and positron annihilation lifetime spectra (PAL) changed from 20% to 25%. The 3gamma fraction and o-Ps formation probability in the polymer XAD-4 is found to be the largest. Elemental analysis performed using scanning electron microscop (SEM) equipped with energy-dispersive X-ray spectroscop EDS show high purity of the investigated materials., 12 pages, 2 figures

Published
2016
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