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arXiv 0712.3158hep-ph
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辐射B衰变的最新进展

Recent developments in radiative B decays

T. Huber

摘要:

我们报告了辐射B衰变的最新理论进展。我们着重计算了稀有衰变反B--> X(s)l+ l-的分支比和前后不对称性的量子增强QED修正,并给出了详细的唯象分析结果.我们还报道了对反B-> X(s)γ衰变的非线性QCD修正的计算。就排他性模式而言,我们考虑排他性反B-> K^* l+ l-衰变中的横向振幅和右手电流的影响。最后,我们陈述了排他性B --> V γ衰变的结果,特别是排他性B --> K^* γ衰变中随时间变化的CP不对称性及其作为标准模型的所谓"零检验“的潜力,以及从B -->(ρ,ω)γ和B --> K^* γ衰变中提取CKM和么正三角形参数。

英文摘要:

We report on recent theoretical progress in radiative B decays. We focus on a calculation of logarithmically enhanced QED corrections to the branching ratio and forward-backward asymmetry in the inclusive rare decay anti-B --> X(s) l+ l-, and present the results of a detailed phenomenological analysis. We also report on the calculation of NNLO QCD corrections to the inclusive decay anti-B --> X(s) gamma. As far as exclusive modes are concerned we consider transversity amplitudes and the impact of right-handed currents in the exclusive anti-B --> K^* l+ l- decay. Finally, we state results for exclusive B --> V gamma decays, notably the time-dependent CP-asymmetry in the exclusive B --> K^* gamma decay and its potential to serve as a so-called ``null test'' of the Standard Model, and the extraction of CKM and unitarity triangle parameters from B --> (rho,omega) gamma and B --> K^* gamma decays.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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