Using B 0 s Decays to Determine the CP Angles α and γ
نویسندگان
چکیده
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 α and γ from measurements of the decay rates of B 0 d (t) → π + π − , B 0 d → π − K + and B + → π + K 0 , along with their charge-conjugate processes. We extend their analysis to include the SU(3)-related decays B 0 s → π + K − , B 0 s (t) → K + K − and B 0 s → K 0 ¯ 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 γ can be obtained cleanly, with no penguin contamination, by using the two decays B 0 s (t) → K + K − and B 0 s → K 0 ¯ K 0 .
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