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Can contributions to B_s→l~+l~-γ from the magnetic-penguin operator with real photons in the standard model be neglected?
作者姓名:王雯宇  熊兆华  周四红
作者单位:Institute of Theoretical Physics, Beijing University of Technology, Beijing 100124, China
基金项目:Supported by National Natural Science Foundation of China(11005006,11172008);Ri Xin Foundation of BJUT
摘    要:Using the Bs meson wave function extracted from non-leptonic Bs decays, we reevaluate the rare decays Bs→l+l- γ,(l=e,μ) in the Standard Model, including two kinds of contributions from the magnetic-penguin operator with virtual and real photons. We find that contributions to the exclusive decays from the magnetic-penguin operator b→sγ with real photons, which were regarded as negligible in the previous literature, are large and the branching ratios Bs→l+l-γ are enhanced by a factor of almost 2. With the predicted branching ratios of the order of 10-8, it is expected that these radiative dileptonic decays will be detected in LHC-b and B factories in the near future.

关 键 词:Bs→l+l-γ  magnetic-penguin operator  real photons
收稿时间:2013-07-17
修稿时间:2013-12-07
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