Implications of CP Asymmetry Limits for $B\to K\pi$ and $B\to \pi \pi$

Abstract

Recent experimental limits for the direct CP asymmetries in $B^0\to K^{+}{\pi }^{-}$, $B^{+}\to K^{+}{\pi }^0$, $B^{+}\to K^0{\pi }^{+}$, and $B^0\to {\pi }^{+}{\pi }^{-}$, and for the indirect CP asymmetry in $B^0\to {\pi }^{+}{\pi }^{-}$, are combined with information on CP-averaged branching ratios to shed light on weak and strong phases. At present such bounds favor $\gamma \ge 60^{\circ }$ at the $1\sigma$ level. The prospects for further improvements are discussed.

16 pages, LaTeX, 3 figures, revised version to be published in Phys. Rev. D. References added and updated

References in corpus (7)

• QCD Factorization in B -> pi K, pi pi Decays and Extraction of Wolfenstein Parameters
• Measurement of Branching Fractions for B->ππ, Kπand KK Decays
• Improving Bounds on Penguin Pollution in B -> pi pi
• Measurement of Branching Fractions and Search for CP-Violating Charge Asymmetries in Charmless Two-Body B Decays into Pions and Kaons
• Model independent sum rules for B-> pi K decays
• Search for Direct CP Violation in B -> K pi Decays
• CKM Phases from CP Asymmetries

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