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arXiv 2302.03002hep-ph
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非通用$Z^\prime$对$B\to K^{(*)}l^+l^-$和$B \to K^{(*)}ν\barν$工艺的影响

Impact of a non-universal $Z^\prime$ on the $B\to K^{(*)}l^+l^-$ and $B \to K^{(*)}ν\barν$ processes

A. V. Bednyakov, A. I. Mukhaeva

摘要:

本文研究了在附加$Z'$向量场的SM无反常超对称扩张的低能近似下半轻子FCNC过程中的新物理效应。该模型的主要特征是$Z'$耦合到费米子的非对角结构,除了SM中众所周知的夸克和轻子混合矩阵之外,还可以用一些新物理参数来参数化。我们不仅考虑CP守恒的情况下,真正的参数,但也占可能的CP破坏由于新的物理弱相位。我们分析了$b\to s$观测量对参数的依赖性以及模型中预测的观测量之间的相关性。特别注意可能的增强$B \to K^{(*)} ν\barν$率和CP奇角观测值的$B \to K^* ll$衰变。

英文摘要:

We perform a study of the new physics effects in semileptonic FCNC processes within a low-energy approximation of the anomaly-free supersymmetic extension of the SM with additional $Z'$ vector field. The key feature of the model is the non-diagonal structure of $Z'$ couplings to fermions, which is parameterized by few new-physics parameters in addition to well-known mixing matrices for quarks and leptons in the SM. We not only consider CP-conserving scenarios with real parameters, but also account for possible CP violation due to new physical weak phases. We analyse the dependence of the $b\to s$ observables on the parameters together with correlations between the observables predicted in the model. Special attention is paid to possible enhancement of $B \to K^{(*)} ν\barν$ rates and to CP-odd angular observables in $B \to K^* ll$ 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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