Role of Electromagnetic Dipole Operator in the Electroweak Penguin Dominated Vector Meson Decays of B Meson |
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引用本文: | 吕才典 沈月龙 王伟. Role of Electromagnetic Dipole Operator in the Electroweak Penguin Dominated Vector Meson Decays of B Meson[J]. 中国物理快报, 2006, 23(10): 2684-2687 |
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作者姓名: | 吕才典 沈月龙 王伟 |
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基金项目: | Supported by the National Natural Science Foundation of China under Grant No 10475085. |
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摘 要: | The pure annihilation type decays Dd^0→Фγand Bs→ργ receive only colour suppressed penguin contributions with a very small branching ratio in the standard model. When we include the previously neglected electromagnetic dipole operator, the branching ratios can be enhanced to R(^-Bd^0→Фγ)≈ 1×10^-11 and R(^-Bs→ργ)~(6 - 16) ×10^-10, which are one order magnitude larger than previous study using the QCD factorization approach. The new effect can also give a large contribution, of order 10^-9, to transverse polarization of B→Фρ and B →ωФ, which is comparable to the longitudinal part. These effects can be detected in the LHCb experiment and the super-B factories.
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关 键 词: | 电磁偶极子算子 向量 介子 理论物理 |
收稿时间: | 2006-07-19 |
修稿时间: | 2006-07-19 |
Role of Electromagnetic Dipole Operator in the Electroweak Penguin Dominated Vector Meson Decays of B Meson |
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