Effective lifetime measurements in the B0s→K+K-, B0→K+π-and B0s→π+K-decays

LHCb Collaboration, R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. AlvarezCartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. Anderson, R. AndreassenM. Andreotti, J. E. Andrews, R. B. Appleby, O. AquinesGutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, S. Bifani, N. Farley, P. Griffith, P. Ilten, I. R. Kenyon, C. Lazzeroni, A. Mazurov, J. McCarthy, C. J. Parkinson, L. Pescatore, D. Popov, N. K. Watson

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Abstract

Measurements of the effective lifetimes in the B0s→K+K-, B0→ K+πand 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.

Original languageEnglish
Pages (from-to)446-454
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume736
Early online date1 Aug 2014
DOIs
Publication statusPublished - 7 Sep 2014

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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