Weak Phase Γ from Ratio of B →
نویسندگان
چکیده
The ratio of partial decay rates for charged and neutral B mesons to Kπ final states provides information on the weak phase γ ≡ Arg(V ∗ ub) when augmented with information on the CP-violating asymmetry in the Kπ mode. The statistical requirements for a useful determination of γ and certain systematic uncertainties are examined in the light of present information about the decays B → Kπ, B → Kπ, and the corresponding charge-conjugate modes. The effects of electroweak penguins and rescattering corrections are noted, and proposals are made for estimating their importance. PACS codes: 12.15.Hh, 12.15.Ji, 13.25.Hw, 14.40.Nd Submitted to Phys. Rev. D. Permanent Address: Physics Department, Technion – Israel Institute of Technology, 32000 Haifa, Israel
منابع مشابه
ar X iv : h ep - p h / 99 04 32 1 v 1 1 3 A pr 1 99 9 EXPLORING THE WEAK PHASE γ IN B
Measurements of the rates for the hadronic decays B ± → πK along with the CP-averaged B ± → π ± π 0 branching ratio can be used to bound and extract the weak phase γ = arg(V * ub). Using preliminary CLEO data, we obtain the bounds |γ| > 93 • at 1σ, and |γ| > 71 • at 90% CL.
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