Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-06-03
Int.J.Mod.Phys. A18 (2003) 1959-1989
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, Revtex, 32 figures, published version with the errors of numerical results caused by the computer program are correc
Scientific paper
10.1142/S0217751X03013661
B meson rare decays ($B\to K(K^{*})l\bar l$ and $B\to K^*\gamma$) are analyzed in the framework of effective field theory of heavy quarks. The semileptonic and penguin type form factors for these decays are calculated by using the light cone sum rules method at the leading order of $1/m_Q$ expansion. Four exact relations between the two types of form factors are obtained at the leading order of $1/m_Q$ expansion. Of particular, the relations are found to hold for whole momentum transfer region. We also investigate the validity of the relations resulted from the large energy effective theory based on the general relations obtained in the present approach. The branching ratios of the rare decays are presented and their potential importance for extracting the CKM matrix elements and probing new physics is emphasized.
Wang Wan-Ying
Wu Yue-Liang
Zhong Ming
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