LHCb CollaborationAdeva Andany, BernardoÁlvarez Cartelle, PaulaDosil Suárez, ÁlvaroGallas Torreira, Abraham AntonioHernando Morata, José ÁngelPazos Álvarez, AntonioPérez Trigo, EliseoPlo Casasus, MáximoRomero Vidal, AntonioSaborido Silva, Juan JoséSanmartín Sedes, BraisSantamarina Ríos, CibránSeco Miguélez, Marcos AntonioVázquez Regueiro, PabloVázquez Sierra, CarlosVieites Díaz, María2020-04-242020-04-242014Collaboration, L. (2014). Effective lifetime measurements in the B0s→K+K−, B0→K+π−and B0s→π+K−decays .Physics Letters B, 736, 446-4540370-2693http://hdl.handle.net/10347/21716Measurements of the effective lifetimes in the B0s→K+K−, B0→K+π−and B0s→π+K−decays are presented using 1.0fb−1of ppcollision data collected at a centre-of-mass energy of 7TeV 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 B0smixing phase and the width difference Γs.eng©2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). Funded by SCOAP3http://creativecommons.org/licenses/by/3.0/journal article10.1016/j.physletb.2014.07.0511873-2445open access