Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-04-10
Eur.Phys.J.C48:401-411,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 pages, 6 figures, comments and reference added, published version
Scientific paper
10.1140/epjc/s10052-006-0029-1
The strong phases and CP violation in the rare $\bar{B}^0\to K^+K^-$, $K^{*\pm}K^\mp$, $K^{*+}K^{*-}$ decays are investigated. As these decays proceed only via annihilation type diagrams in the standard model (SM), a dynamical gluon mass is introduced to avoid the infrared divergence in the soft endpoint regions. The Cutkosky rule is adopted to deal with a physical-region singularity of the on mass-shell quark propagators, which leads to a big imaginary part and hence a large strong phase. As a consequence, large CP asymmetries are predicted in those decay modes due to a big interference between the annihilation amplitudes from penguin and tree operators, which may be tested in future more precise experiments.
Su Fang
Wu Yue-Liang
Yang Ya-Dong
Zhuang Ci
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