The time-dependent CP asymmetries of B0 → π+ π− and B0s → K+ K− decays are measured using a data sample of pp collisions corresponding to an integrated luminosity of 1.9 fb^−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. The results are C_ππ = −0.311 ± 0.045 ± 0.015, S_ππ = −0.706 ± 0.042 ± 0.013, C_KK = 0.164 ± 0.034 ± 0.014, S_KK = 0.123 ± 0.034 ± 0.015, A_KK^ΔΓ = −0.83 ± 0.05 ± 0.09, where the first uncertainties are statistical and the second systematic. The same data sample is used to measure the time-integrated CP asymmetries of B0 → K+ π− and B0s → K− π+ decays and the results are A_CP^B0 = −0.0824 ± 0.0033 ± 0.0033, A_CP^B0s = 0.236 ± 0.013 ± 0.011. All results are consistent with earlier measurements. A combination of LHCb measurements provides the first observation of time-dependent CP violation in B0s decays.

Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Observation of CP Violation in Two-Body B0(s)-Meson Decays to Charged Pions and Kaons. JOURNAL OF HIGH ENERGY PHYSICS, 2021(3), 1-42 [10.1007/JHEP03(2021)075].

Observation of CP Violation in Two-Body B0(s)-Meson Decays to Charged Pions and Kaons

Betti, F.;Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Perazzini, S.;Pisani, F.;Zucchelli, S.;
2021

Abstract

The time-dependent CP asymmetries of B0 → π+ π− and B0s → K+ K− decays are measured using a data sample of pp collisions corresponding to an integrated luminosity of 1.9 fb^−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. The results are C_ππ = −0.311 ± 0.045 ± 0.015, S_ππ = −0.706 ± 0.042 ± 0.013, C_KK = 0.164 ± 0.034 ± 0.014, S_KK = 0.123 ± 0.034 ± 0.015, A_KK^ΔΓ = −0.83 ± 0.05 ± 0.09, where the first uncertainties are statistical and the second systematic. The same data sample is used to measure the time-integrated CP asymmetries of B0 → K+ π− and B0s → K− π+ decays and the results are A_CP^B0 = −0.0824 ± 0.0033 ± 0.0033, A_CP^B0s = 0.236 ± 0.013 ± 0.011. All results are consistent with earlier measurements. A combination of LHCb measurements provides the first observation of time-dependent CP violation in B0s decays.
2021
Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Observation of CP Violation in Two-Body B0(s)-Meson Decays to Charged Pions and Kaons. JOURNAL OF HIGH ENERGY PHYSICS, 2021(3), 1-42 [10.1007/JHEP03(2021)075].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/848628
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