A measurement of the B-0(s) -> J/psi phi decay parameters using 80.5 fb(-1) of integrated luminosity collected with the ATLAS detector from 13 TeV proton-proton collisions at the LHC is presented. The measured parameters include the CP-violating phase phi(s), the width difference Delta Gamma(s) between the B-s(0) meson mass eigenstates and the average decay width Gamma(s). The values measured for the physical parameters are combined with those from 19.2 fb(-1) of 7 and 8 TeV data, leading to the following: phi(s) = -0.087 +/- 0.036 (stat.) +/- 0.021 (syst.) rad Delta Gamma(s) = 0.0657 +/- 0.0043 (stat.) +/- 0.0037 (syst.) ps(-1) Gamma(s) = 0.6703 +/- 0.0014 (stat.) +/- 0.0018 (syst.) ps(-1) Results for phi(s) and Delta Gamma(s) are also presented as 68% confidence level contours in the phi(s)-Delta Gamma(s) plane. Furthermore the transversity amplitudes and corresponding strong phases are measured. phi(s) and Delta Gamma(s) measurements are in agreement with the Standard Model predictions.

Measurement of the CP-violating phase phi(s) in B-s(0) -> J/psi phi decays in ATLAS at 13 TeV / Aad, G., Abbott, B., Abbott, D.c., Abud, A.a., Abeling, K., Abhayasinghe, D.k., Abidi, S.h., Abouzeid, O.s., Abraham, N.l., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B.s., Achkar, B., Adam, L., Bourdarios, C.a., Adamczyk, L., Adamek, L., Adelman, J., Adiguzel, A., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 81:(2021). [10.1140/epjc/s10052-021-09011-0]

Measurement of the CP-violating phase phi(s) in B-s(0) -> J/psi phi decays in ATLAS at 13 TeV

Artoni, G;Bagnaia, P;Betti, A;Bini, C;Gauzzi, P;Gentile, S;Giagu, S;Huang, X;Kado, M;Lacava, F;Luci, C;Marchese, L;Martinelli, L;Sabetta, L;
2021

Abstract

A measurement of the B-0(s) -> J/psi phi decay parameters using 80.5 fb(-1) of integrated luminosity collected with the ATLAS detector from 13 TeV proton-proton collisions at the LHC is presented. The measured parameters include the CP-violating phase phi(s), the width difference Delta Gamma(s) between the B-s(0) meson mass eigenstates and the average decay width Gamma(s). The values measured for the physical parameters are combined with those from 19.2 fb(-1) of 7 and 8 TeV data, leading to the following: phi(s) = -0.087 +/- 0.036 (stat.) +/- 0.021 (syst.) rad Delta Gamma(s) = 0.0657 +/- 0.0043 (stat.) +/- 0.0037 (syst.) ps(-1) Gamma(s) = 0.6703 +/- 0.0014 (stat.) +/- 0.0018 (syst.) ps(-1) Results for phi(s) and Delta Gamma(s) are also presented as 68% confidence level contours in the phi(s)-Delta Gamma(s) plane. Furthermore the transversity amplitudes and corresponding strong phases are measured. phi(s) and Delta Gamma(s) measurements are in agreement with the Standard Model predictions.
2021
b-hadrons; proton proton collisions; lhc
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the CP-violating phase phi(s) in B-s(0) -> J/psi phi decays in ATLAS at 13 TeV / Aad, G., Abbott, B., Abbott, D.c., Abud, A.a., Abeling, K., Abhayasinghe, D.k., Abidi, S.h., Abouzeid, O.s., Abraham, N.l., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B.s., Achkar, B., Adam, L., Bourdarios, C.a., Adamczyk, L., Adamek, L., Adelman, J., Adiguzel, A., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 81:(2021). [10.1140/epjc/s10052-021-09011-0]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1655969
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