Effective lifetime measurements in the B[0 over s]--> K+K−, B[superscript 0]-->K+π− and B[0 over s]-->π+K− decays
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Aaij-2014-Effective lifetime m.pdf
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Author(s)
LHCb collaboration
Counts, Ian Thomas Hunt
Ilten, Philip James
Williams, M.
Alternative Title
Effective lifetime measurements in the Bs0→K+K−, B0→K+π− and Bs0→π+K− decays
Date Issued
September 2014
Journal
Physics Letters B
Publisher
Elsevier B.V.
Citation
Aaij, R. et al. “Effective Lifetime Measurements in the Bs0→K+K−, B0→K+π− and Bs0→π+K− Decays.” Physics Letters B 736 (September 2014): 446–454.
Version
Final published version
Abstract
Measurements of the effective lifetimes in the B[0 over s]→K+K−, B0→K+π−B[superscript 0]→K+π− and B[0 over s]→π+K− decays are presented using 1.0 fb−11.0 fb[superscript −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
τBs0→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 ΔΓs.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2014.07.051
