Measurement of the effective $B_s^0\to K^{+}{K}^{-}$ lifetime

Abstract

A measurement of the effective $B_s^0\to K^{+}{K}^{-}$ lifetime is presented using approximately $37p{b}^{-1}$ of data collected by LHCb during 2010. This quantity can be used to put constraints on contributions from processes beyond the Standard Model in the $B_s^0$ meson system and is determined by two complementary approaches as $\ddot{I}{„}_{B_s^0\to K^{+}{K}^{-}}=1.440\pm 0.096(stat)\pm 0.008(syst)\pm 0.003(model)ps$.