Measurements of the effective lifetimes in the B<inf>s</inf><sup>0</sup>→K<sup>+</sup>K<sup>-</sup>,<sup>B0</sup>→<sup>K +π-</sup> and Bs0→π+K- decays are presented using 1.0<sup> fb -1</sup> 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 areτBs0→K+K-=1.407±0.016(stat)±0.007(syst) ps,τB0→K+π-=1.524±0.011(stat)±0.004(syst) ps,τBs0→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 Bs0→K+K- decay and provides constraints on contributions from physics beyond the Standard Model to the Bs0 mixing phase and the width difference δ<inf>Γs</inf>. © 2014 The Authors.
Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., et al. (2014). Effective lifetime measurements in the Bs0 → K+ K-, B0 → K+ π- and Bs0→π+ K- decays. PHYSICS LETTERS. SECTION B, 736, 446-454 [10.1016/j.physletb.2014.07.051].
Effective lifetime measurements in the Bs0 → K+ K-, B0 → K+ π- and Bs0→π+ K- decays
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2014
Abstract
Measurements of the effective lifetimes in the B
s 0 →K
+ K
- ,
B0 →
K +π- and Bs0→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 areτBs0→K+K-=1.407±0.016(stat)±0.007(syst) ps,τB0→K+π-=1.524±0.011(stat)±0.004(syst) ps,τBs0→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 Bs0→K+K- decay and provides constraints on contributions from physics beyond the Standard Model to the Bs0 mixing phase and the width difference δ
Γs . © 2014 The Authors.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/89332
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