Measurement of $\gamma$ from $B\to DK$ decays at LHCb

Abstract

We report results from the first measurements of the CKM angle $\gamma$ using $B\to DK$ decays with the LHCb experiment. Three well established methods are used to extract the CP observables. The updated measurement of $\gamma$ in the three-body $D^0$ Dalitz space results in $\gamma =(57\pm 16{)}^{\circ }$. When combining the observables from all \bdk studies, the best fit value for $\gamma \in [0,180{]}^{\circ }$ is $\gamma =67.2^{\circ }$ with $\gamma \in [55.1,79.1{]}^{\circ }$ at 68%CL and $\gamma \in [43.9,89.5{]}^{\circ }$ at 95%CL. This represents the most precise $\gamma$ values directly measured by a single experiment. Furthermore, a new time-dependent approach using $B_s\to D_{s}K$ decays is used for the first time to measure CP observables and future prospects for $\gamma$ at LHCb are given.

4 pages, 7 figures. Proceedings of the LHCP 2013 conference

References in corpus (3)

• Enhanced CP Violation with $B\to K{D}^0({\overline{D}}^0)$ Modes and Extraction of the CKM Angle gamma
• Determining $\gamma$ using $B^{\pm }\to D{K}^{\pm }$ with multibody D decays
• Observation of direct CP violation in the measurement of the Cabibbo-Kobayashi-Maskawa angle gamma with B+- --> D(*)K(*)+- decays

Cited by in corpus (1)

• Effects of K-\bar K mixing on determining gamma from B^\pm -> DK^\pm