arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新，休息一下吧，周末愉快~~
arXiv 2108.05033hep-phhep-ex
收藏

$R^ν_{K^{(*)}}$和非标准中微子相互作用

$R^ν_{K^{(*)}}$ and non-standard neutrino interactions

Xiao Gang He, German Valencia

备注：
fixed typo in Eqs. 7,8
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

我们讨论的模式$B\to K^{(*)}ν\barν$的背景下，非标准中微子相互作用，增加非相干的SM率。我们考虑两种情况：一个额外的轻中微子和中微子轻子味破坏。我们发现，一个额外的轻中微子，通过非通用的$Z^\prime$与SM场相互作用，可以增加$R^ν_{K^{(*)}}$的两倍，而不冲突的$B_s-\bar B_s$混合。然后，该模型预测$B_s\to τ^+τ^-$的速率比SM大六倍。在由轻夸克介导的中微子轻子味破坏的背景下，我们发现，目前的实验上的$R^ν_{K^{(*)}}$的上限已经比直接的限制从$B_s\to τ\ell$和$B\to K^{(*)}τ\ell$模式的$\ell=e,μ$。

英文摘要：

We discuss the modes $B\to K^{(*)}ν\barν$ in the context of non-standard neutrino interactions that add incoherently to the SM rates. We consider two scenarios: an additional light neutrino; and neutrino lepton flavour violation. We find that an additional light neutrino that interacts with SM fields via a non-universal $Z^\prime$ can increase $R^ν_{K^{(*)}}$ by up to a factor of two without conflicting with $B_s-\bar B_s$ mixing. This model then predicts rates for $B_s\to τ^+τ^-$ up to six times larger than the SM. In the context of neutrino lepton flavour violation mediated by leptoquarks we find that the current experimental upper bounds on $R^ν_{K^{(*)}}$ are already more constraining than direct bounds from $B_s\to τ\ell$ and $B\to K^{(*)}τ\ell$ modes for $\ell=e,μ$.

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。

↑