Measurement of the effective $B^0_s\rightarrow K^+K^-$ lifetime

TL;DR

This paper reports a measurement of the effective lifetime of the $B^0_s$ meson decaying into $K^+K^-$ using LHCb data, providing insights into potential new physics beyond the Standard Model.

Contribution

First measurement of the $B^0_s ightarrow K^+K^-$ effective lifetime using LHCb data from 2010, employing two complementary analysis methods.

Findings

Effective lifetime measured as 1.440 ps with uncertainties.

Results constrain possible contributions from beyond Standard Model processes.

Measurement consistent with Standard Model predictions.

Abstract

A measurement of the effective $B^0_s\rightarrow K^+K^-$ lifetime is presented using approximately $37 pb^{-1}$ 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 $B^0_s$ meson system and is determined by two complementary approaches as $\tau_{B^0_s\to K^+K^-} = 1.440 \pm 0.096 (stat) \pm 0.008 (syst) \pm 0.003 (model) ps$.