Speaker
Description
The study of B decays has led to a much better understanding in the flavor sector of the SM. In the CP-violation study, the measurement of sin(2β) has an important role. The “golden channel” B0 → J/ψK0S plays an outstanding role for a clean measurement of sin(2β), where β is one of the angles of the CKM unitarity triangle. The channel B0s → J/ψK0S is related to B0 → J/ψK0S through interchanging all d quarks with s quarks and allows to get a handle on the penguin effects. The determination of the effective lifetime in the B0s →J/ψK0S will be an essential step towards the time-dependent CP violation study. As a first step, we are measuring the effective lifetime of the decay B0s → J/ψK0S with the full RunII data collected by CMS detector.
