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 τB0s→K+K- = 1.407±0.016(stat)±0.007(syst) ps, τB0→K+π- = 1.524±0.011(stat)±0.004(syst) ps, τB0s→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 ΔΓs.
|Number of pages||9|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Early online date||1 Aug 2014|
|Publication status||Published - 7 Sept 2014|
ASJC Scopus subject areas
- Nuclear and High Energy Physics