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arXiv 1106.4589hep-ph
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B-> X_{s,d} + γ衰变中的直接CP不对称性

Direct CP Asymmetry in B->X_{s,d}+gamma Decays

Gil Paz

摘要:

包含B-> X_{s,d} + γ衰变的CP不对称性是新物理的重要探索。理论预测被认为是微扰的起源,在标准模型中,大约是0.5%。在最近的一次工作中,M。Benzke,S.J. Lee和M. Neubert,我们已经表明,非微扰效应实际上占主导地位的不对称性。由于这些很难估计,它降低了对新物理效应的敏感性。另一方面,这些新的非微扰效应表明,通过观察带电与中性B介子衰变中CP不对称性的差异,可以对新物理学进行新的测试。

英文摘要:

The CP asymmetry in inclusive B->X_{s,d}+gamma decays is an important probe of new physics. The theoretical prediction was thought to be of a perturbative origin, and in the standard model, to be about 0.5 percent. In a recent work with M. Benzke, S.J. Lee and M. Neubert, we have shown that the asymmetry is in fact dominated by non-perturbative effects. Since these are hard to estimate, it reduces the sensitivity to new physics effects. On the other hand, these new non-perturbative effects suggest a new test of new physics by looking at the difference of the CP asymmetries in charged versus neutral B-meson 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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