The time-dependent CP asymmetries of B0 → π+π− and B0s → K+K− decaysare measured using a data sample of pp collisions corresponding to an integrated luminosityof 1.9 fb−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. Theresults areCππ = −0.311 ± 0.045 ± 0.015,Sππ = −0.706 ± 0.042 ± 0.013,CKK = 0.164 ± 0.034 ± 0.014,SKK = 0.123 ± 0.034 ± 0.015,A∆ΓKK = −0.83 ± 0.05 ± 0.09,where the first uncertainties are statistical and the second systematic. The same datasample is used to measure the time-integrated CP asymmetries of B0 → K + π− andB0s → K−π+ decays and the results areAB0CP = −0.0824 ± 0.0033 ± 0.0033,AB0sCP = 0.236 ± 0.013 ± 0.011.All results are consistent with earlier measurements. A combination of LHCb measurementsprovides the first observation of time-dependent CP violation in B0s decays

Observation of CP violation in two-body B(s)0 -meson decays to charged pions and kaons / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., Amato, S., Amhis, Y., An, L., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2021:3(2021). [10.1007/JHEP03(2021)075]

Observation of CP violation in two-body B(s)0 -meson decays to charged pions and kaons

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2021

Abstract

The time-dependent CP asymmetries of B0 → π+π− and B0s → K+K− decaysare measured using a data sample of pp collisions corresponding to an integrated luminosityof 1.9 fb−1, collected with the LHCb detector at a centre-of-mass energy of 13 TeV. Theresults areCππ = −0.311 ± 0.045 ± 0.015,Sππ = −0.706 ± 0.042 ± 0.013,CKK = 0.164 ± 0.034 ± 0.014,SKK = 0.123 ± 0.034 ± 0.015,A∆ΓKK = −0.83 ± 0.05 ± 0.09,where the first uncertainties are statistical and the second systematic. The same datasample is used to measure the time-integrated CP asymmetries of B0 → K + π− andB0s → K−π+ decays and the results areAB0CP = −0.0824 ± 0.0033 ± 0.0033,AB0sCP = 0.236 ± 0.013 ± 0.011.All results are consistent with earlier measurements. A combination of LHCb measurementsprovides the first observation of time-dependent CP violation in B0s decays
2021
B physics; CP violation; flavor physics; Hadron-Hadron scattering (experiments); oscillation
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of CP violation in two-body B(s)0 -meson decays to charged pions and kaons / Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., Alkhazov, G., Alvarez Cartelle, P., Amato, S., Amhis, Y., An, L., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2021:3(2021). [10.1007/JHEP03(2021)075]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1579924
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