Time-dependent CP asymmetries in Bs decays at LHCb

TL;DR

This paper discusses the LHCb experiment's approach to measuring time-dependent CP asymmetries in Bs decays to detect potential New Physics effects, with high sensitivity expected from initial data.

Contribution

It presents the expected sensitivity of the LHCb experiment to the CP-violation parameter phi_s using Monte Carlo simulations with 2 fb^{-1} of data.

Findings

Expected sensitivity of sigma(phi_s) = 0.022 with 2 fb^{-1}

Potential to discover or exclude large New Physics effects in Bs mixing

Monte Carlo simulation results for LHCb detector performance

Abstract

The LHCb experiment will search for New Physics in Bs mixing. The Bs mixing phase will be extracted from the measurement of the time-dependent CP asymmetry in exclusive Bs decays governed by the b -> ccbar s quark-level transition. Large New Physics effects can be discovered or excluded with the data collected during the very first physics run of LHC. Based on Monte Carlo simulations of the LHCb detector, the expected sensitivity with 2 inverse fb on the CP-violation parameter phi_s is sigma(phi_s) = 0.022.