Measurements of the effective lifetimes in the B0s → K+ K−, B0 → K+ π− and B0s → π+ K− decays are presented using 1.0 fb^−1 of pp collision data collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The analysis uses a data-driven approach to correct for the decay time acceptance. The measured effective lifetimes are τ_{B0s → K+ K−} = 1.407 ± 0.016(stat) ± 0.007(syst) ps, τ_{B0 → K+ π−} = 1.524 ± 0.011(stat) ± 0.004(syst) ps, τ_{B0s → π+ K−} = 1.60 ± 0.06(stat) ± 0.01(syst) ps. This is the most precise determination to date of the effective lifetime in the B0s → K+ K− decay and provides constraints on contributions from physics beyond the Standard Model to the B0s mixing phase and the width difference ΔΓ_s.

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. (2014). Effective Lifetime Measurements in the B0s → K+ K−, B0 → K+ π− and B0s → π+ K− Decays. PHYSICS LETTERS. SECTION B, 736, 446-454 [10.1016/j.physletb.2014.07.051].

Effective Lifetime Measurements in the B0s → K+ K−, B0 → K+ π− and B0s → π+ K− Decays

CARBONE, ANGELO;GALLI, DOMENICO;MOGGI, NICCOLO';MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2014

Abstract

Measurements of the effective lifetimes in the B0s → K+ K−, B0 → K+ π− and B0s → π+ K− decays are presented using 1.0 fb^−1 of pp collision data collected at a centre-of-mass energy of 7 TeV by the LHCb experiment. The analysis uses a data-driven approach to correct for the decay time acceptance. The measured effective lifetimes are τ_{B0s → K+ K−} = 1.407 ± 0.016(stat) ± 0.007(syst) ps, τ_{B0 → K+ π−} = 1.524 ± 0.011(stat) ± 0.004(syst) ps, τ_{B0s → π+ K−} = 1.60 ± 0.06(stat) ± 0.01(syst) ps. This is the most precise determination to date of the effective lifetime in the B0s → K+ K− decay and provides constraints on contributions from physics beyond the Standard Model to the B0s mixing phase and the width difference ΔΓ_s.
2014
R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. (2014). Effective Lifetime Measurements in the B0s → K+ K−, B0 → K+ π− and B0s → π+ K− Decays. PHYSICS LETTERS. SECTION B, 736, 446-454 [10.1016/j.physletb.2014.07.051].
R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A.A. Alves...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/329117
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