The first measurement of decay-time-dependent CP asymmetries in the decay B0s → J/ψ K0S and an updated measurement of the ratio of branching fractions B(B0s → J/ψ K0S)/B(B0 → J/ψ K0S) 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 are A_ΔΓ(B0s → J/ψ K0S) = 0.49{−0.65}{+0.77}(stat) ± 0.06(syst), C_dir(B0s → J/ψ K0S) = −0.28 ± 0.41(stat) ± 0.08(syst), S_mix(B0s → J/ψ K0S) = −0.08 ± 0.40(stat) ± 0.08(syst). The ratio B(B0s → J/ψ K0S)/B(B0 → J/ψ K0S) is measured to be 0.0431 ± 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.

Aaij, R., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2015). Measurement of the Time-Dependent CP Asymmetries in B0s → J/ψ K0S. JOURNAL OF HIGH ENERGY PHYSICS, 2015(6), 0-21 [10.1007/JHEP06(2015)131].

Measurement of the Time-Dependent CP Asymmetries in B0s → J/ψ K0S

Capriotti, L.;CARBONE, ANGELO;GALLI, DOMENICO;MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2015

Abstract

The first measurement of decay-time-dependent CP asymmetries in the decay B0s → J/ψ K0S and an updated measurement of the ratio of branching fractions B(B0s → J/ψ K0S)/B(B0 → J/ψ K0S) 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 are A_ΔΓ(B0s → J/ψ K0S) = 0.49{−0.65}{+0.77}(stat) ± 0.06(syst), C_dir(B0s → J/ψ K0S) = −0.28 ± 0.41(stat) ± 0.08(syst), S_mix(B0s → J/ψ K0S) = −0.08 ± 0.40(stat) ± 0.08(syst). The ratio B(B0s → J/ψ K0S)/B(B0 → J/ψ K0S) is measured to be 0.0431 ± 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
Aaij, R., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., et al. (2015). Measurement of the Time-Dependent CP Asymmetries in B0s → J/ψ K0S. JOURNAL OF HIGH ENERGY PHYSICS, 2015(6), 0-21 [10.1007/JHEP06(2015)131].
Aaij, R., Adeva, B.; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Cartelle, P...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/515021
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