Measurement of ${\varphi }_s$ at LHCb

Abstract

The study of CP violation in $B_s^0$ oscillations is one of the key goals of the LHCb experiment. Effects are predicted to be very small in the Standard Model but can be significantly enhanced in many models of new physics. We present the world's best measurement of the CP-violating phase ${\varphi }_s$ using $B_s^0\to J/\psi KK$ and $B_s^0\to J/\psi \pi \pi$ decays.

Presentation at the DPF 2013 Meeting of the American Physical Society Division of Particles and Fields, Santa Cruz, California, August 13-17, 2013