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arXiv 2111.04478hep-ph
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在味特异性非轻子衰变中用CP不对称性检验标准模型

Testing the Standard Model with CP-asymmetries in flavour-specific non-leptonic decays

Tim Gershon, Alexander Lenz, Aleksey V. Rusov, Nicola Skidmore

摘要:

最近的迹象表明,颜色允许的非轻子通道的速率是不符合他们的标准模型的期望QCD因式分解的基础上,我们调查的潜力,研究CP不对称与这些衰变。在标准模型中,这些特定于味道的衰变对$B^0_{(s)}$ -$\bar{B}^0_{(s)}$混合中的CP破坏敏感,这是以低不确定性预测的,并且可以用半轻子衰变精确测量。如果非轻子衰变振幅有超过标准模型的贡献,CP不对称性可能会有显著的增强。因此,这些量的测量有可能识别BSM效应,而不依赖于可能受强子效应影响的标准模型预测。我们讨论了实验前景,并注意到良好的潜力,精确测定的CP不对称性$\bar{B}_s \to D_s^+ π^-$衰变的LHCb实验。

英文摘要:

Motivated by recent indications that the rates of colour-allowed non-leptonic channels are not in agreement with their Standard Model expectations based on QCD factorisation, we investigate the potential to study CP asymmetries with these decays. In the Standard Model, these flavour-specific decays are sensitive to CP violation in $B^0_{(s)}$--$\bar{B}^0_{(s)}$ mixing, which is predicted with low uncertainties and can be measured precisely with semileptonic decays. If there are beyond Standard Model contributions to the non-leptonic decay amplitudes, there could be significant enhancements to the CP asymmetries. Measurements of these quantities therefore have potential to identify BSM effects without relying on Standard Model predictions that might be affected by hadronic effects. We discuss the experimental prospects, and note the excellent potential for a precise determination of the CP asymmetry in $\bar{B}_s \to D_s^+ π^-$ decays by the LHCb experiment.

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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