Determining the CP Violation Angle $γ$ in $B_s$ Decays without Hadronic Uncertainty

Details Determining the CP Violation Angle $γ$ in $B_s$ Decays without Hadronic Uncertainty Determining the CP Violation Angle $γ$ in $B_s$ Decays without Hadronic Uncertainty

2005-02-03

arxiv.org/abs/hep-ph/0502034v3

Phys.Rev. D71 (2005) 117301

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, including 2 figures, Revtex

Scientific paper

10.1103/PhysRevD.71.117301

We study the rare decays $B_s^0\to D^\pm \pi^\mp$ and $\bar B_s^0\to D^\mp \pi^\pm$, which can occur only via annihilation type $W$ exchange diagrams in the standard model. The time-dependent decay rates of the four channels can provide four CP parameters, which are experimentally measurable. We show that the CKM angle $\phi_3=\gamma$ can be determined from these parameters without any theoretical model dependence. These channels can be measured in future LHCb experiments to provide a clean way for $\gamma$ measurement.

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