Using B_s^0 Decays to Determine the CP Angles αand γ

Details Using B_s^0 Decays to Determine the CP Angles αand γ Using B_s^0 Decays to Determine the CP Angles αand γ

1997-08-15

arxiv.org/abs/hep-ph/9708356v1

Phys.Rev.D57:4010-4024,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, LaTeX

Scientific paper

10.1103/PhysRevD.57.4010

Dighe, Gronau and Rosner have shown that, by assuming SU(3) flavor symmetry and first-order SU(3) breaking, it is possible to extract the CP angles \alpha and \gamma from measurements of the decay rates of B_d^0(t) --> \pi^+\pi^-, B_d^0 --> \pi^- K^+ and B^+ --> \pi^+ K^0, along with their charge-conjugate processes. We extend their analysis to include the SU(3)-related decays B_s^0 --> \pi^+ K^-, B_s^0(t) --> K^+ K^- and B_s^0 --> K^0 {\bar K^0}. There are several advantages to this extension: discrete ambiguities are removed, fewer assumptions are necessary, and the method works even if all strong phases vanish. In addition, we show that \gamma can be obtained cleanly, with no penguin contamination, by using the two decays B_s^0(t) --> K^+ K^- and B_s^0 --> K^0 {\bar K^0}.

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