The first measurement of decay-time-dependent CP asymmetries in the decay B0s → J/ψK0Sand an updated measurement of the ratio of branching fractionsB(B0s → J/ψK0S)/B(B0 → J/ψK0S) are presented. The results are obtained using data corresponding to an integrated luminosity of 3.0 fb−1 of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The results on the CP asymmetries areA∆Γ(B0s → J/ψK0S) = 0.49 ±0.770.65 (stat) ± 0.06(syst), Cdir(B0s → J/ψK0S) = −0.28 ± 0.41(stat) ± 0.08(syst), Smix(B0s → J/ψK0S) = −0.08 ± 0.40(stat) ± 0.08(syst). The ratio B(B0s → J/ψK0S)/B(B0 → J/ψK0S) is measured to be0.0431 ± 0.0017(stat) ± 0.0012(syst) ± 0.0025(fs/fd),where the last uncertainty is due to the knowledge of the B0s and B0 production fractions.

Measurement of the time-dependent CP asymmetries in Bs0→ J/ψKS0 / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreotti, M., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2015:6(2015). [10.1007/JHEP06(2015)131]

Measurement of the time-dependent CP asymmetries in Bs0→ J/ψKS0

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2015

Abstract

The first measurement of decay-time-dependent CP asymmetries in the decay B0s → J/ψK0Sand an updated measurement of the ratio of branching fractionsB(B0s → J/ψK0S)/B(B0 → J/ψK0S) are presented. The results are obtained using data corresponding to an integrated luminosity of 3.0 fb−1 of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The results on the CP asymmetries areA∆Γ(B0s → J/ψK0S) = 0.49 ±0.770.65 (stat) ± 0.06(syst), Cdir(B0s → J/ψK0S) = −0.28 ± 0.41(stat) ± 0.08(syst), Smix(B0s → J/ψK0S) = −0.08 ± 0.40(stat) ± 0.08(syst). The ratio B(B0s → J/ψK0S)/B(B0 → J/ψK0S) is measured to be0.0431 ± 0.0017(stat) ± 0.0012(syst) ± 0.0025(fs/fd),where the last uncertainty is due to the knowledge of the B0s and B0 production fractions.
2015
CP violation, Hadron-Hadron Scattering, Branching fraction, B physics, Flavor physics
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the time-dependent CP asymmetries in Bs0→ J/ψKS0 / Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., Andreotti, M., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2015:6(2015). [10.1007/JHEP06(2015)131]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074832
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