Weak Phases and CP Violation

Abstract

Time-dependent CP asymmetries in $B^0$ decays from interference of $B^0$-${\bar{B}}^0$ mixing and $b\to c\bar{c}s,u\bar{u}d,sq\bar{q}$, and direct asymmetries from interference of $b\to c\bar{u}s$ and $b\to u\bar{c}s$ are studied, improving errors in the weak phases $\beta$ and $\gamma$ to $\pm 1^{\circ }$ and $\pm 7^{\circ }$, respectively. Two kinds of tests for New Physics are discussed: 1. Deviations of asymmetries in $b\to sq\bar{q}$ decays from $\sin 2\beta \sin \Delta mt$. 2. Violation of a sum rule for direct asymmetries in $B\to K\pi$.

7 pages, talk presented at Beauty 2005, Assisi, Italy, June 20-24, 2005; few numerical corrections

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• Limit on the B0->rho0rho0 Branching Fraction and Implications for the CKM Angle alpha
• Reducing the Error on alpha in B-> pi pi, rho rho, rho pi
• Can one detect new physics in I=0 and/or I=2 contributions to the decays B --> pi pi?

Cited by in corpus (3)

• A precise determination of $\alpha$ using $B^0\to {\rho }^{+}{\rho }^{-}$ and $B^{+}\to K^{\ast 0}{\rho }^{+}$
• Determination of gamma from Charmless B --> M1 M2 Decays Using U-Spin
• Improving the measurement of the CKM phase ${\varphi }_2=\alpha$ in $B\to \pi \pi$ and $B\to \rho \rho$ decays