$gamma$ measurements at LHCb

Abstract

The LHCb collaboration has studied various promising ways to determine the Unitarity Triangle angle $\gamma$. Three complementary methods will be considered. The potential of the $B\to D{K}^{(\ast )}$ decays has been studied by employing the combined Gronau-London-Wyler (GLW) and the Atwood-Dunietz-Soni (ADS) methods, making use of a large sample of simulated data. $\gamma$ can also be extracted with a time-dependent analysis of $B_s\to D_{s}K$ decays, provided that the $B_s$ mixing phase is measured independently. In addition, the combined measurement of the $B^0\to {\pi }^{+}{\pi }^{-}$ and $B_s^0\to K^{+}{K}^{-}$ time-dependent CP asymmetries allows the determination of $\gamma$, up to U-spin flavour symmetry breaking corrections. For each method the expected sensitivities to the angle $\gamma$ are presented.

Flavor Physics & CP Violation Conference, Taipei, 2008