Search for CP violation in B^0 -> J/psi K^0_S decays with first LHCb data

TL;DR

This paper reports the first measurement of CP violation in B^0 -> J/psi K^0_S decays using early LHCb data, employing a time-dependent analysis to quantify CP asymmetry.

Contribution

It presents the initial measurement of CP violation in B^0 decays with LHCb data, demonstrating the experiment's capability to study CP asymmetries.

Findings

First measurement of CP violation in B^0 -> J/psi K^0_S decays at LHCb

Utilized 35/pb of data from 2010 for analysis

Results contribute to understanding matter-antimatter asymmetry

Abstract

We report a measurement of the CP violation in B^0 -> J/\psi K^0_S decays. We perform a time-dependent analysis of the decays reconstructed in 35/pb of LHCb data that was taken in 2010. We measure the CP asymmetry parameter