Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-12-26
Nucl.Phys.Proc.Suppl.207-208:391-394,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
talk presented at the 15th International Conference in QCD, June 28- July 3, 2010, Montpellier, France
Scientific paper
10.1016/j.nuclphysbps.2010.10.10
Within the framework of QCD factorization (QCDF), power corrections due to penguin annihilation can account for theobserved rates of penguin-dominated two-body decays of $B$ mesons and direct CP asymmetries $A_{CP}(K^-\pi^+)$, $A_{CP}((K^{*-}\pi^+)$, $A_{CP}((K^-\rho^0)$ and $A_{CP}((\pi^+\pi^-)$. However, the predicted direct CP-violating effects in QCDF for $B^-\to K^-\pi^0,K^-\eta,\pi^-\eta$ and $\bar B^0\to\pi^0\pi^0$ are wrong in signs when confronted with experiment. We consider two different types of power correction effects in order to resolve the CP puzzles and rate deficit problems with penguin-dominated two-body decays of $B$ mesons and color-suppressed tree-dominated $\pi^0\pi^0$ and $\rho^0\pi^0$ modes: penguin annihilation and soft corrections to the color-suppressed tree amplitude.
Cheng Hai-Yang
Chua Chun-Khiang
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