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arXiv 1606.00951hep-phhep-ex
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$h\to μτ$中LFV的Yukawa扇区和$h\to ττ$中的CP破坏

Yukawa sector for LFV in $h\to μτ$ and CP violation in $h\to ττ$

Alper Hayreter, Xiao-Gang He, German Valencia

摘要:

在大型强子对撞机上发现的希格斯玻色子为粒子物理学揭开了新的篇章。它的性质需要详细研究,以区分一个纯粹的标准模型(SM)希格斯玻色子,从一个扩大的希格斯扇区的许多标量之一。CMS合作报告了一个可能的轻子味道违反(LFV)信号$h\toμτ$,如果得到证实,这意味着希格斯部门比SM更大。一般来说,负责这种类型衰变的新物理学也可能引入其他可观察到的效应,例如$h\to ττ$中的电荷宇称(CP)破坏。我们研究了两种类型的模型,挑选出第三代,并可以诱导大的$h \to μτ$率与不同的后果CP破坏在$h \to ττ$。预测的CP违反耦合的大小需要知识的轻子汤川矩阵,我们讨论这两个不同的纹理考虑所有现有的限制。

英文摘要:

The Higgs boson discovered at the LHC opened a new chapter for particle physics. Its properties need to be studied in detail to distinguish a purely standard model (SM) Higgs boson from one of many scalars in an enlarged Higgs sector. The CMS collaboration has reported a possible lepton flavor violating (LFV) signal $h\toμτ$, which if confirmed, implies that the Higgs sector is larger than in the SM. New physics responsible for this type of decay may, in general, also introduce other observable effects such as charge-parity (CP) violation in $h\to ττ$. We study two types of models that single out the third generation and can induce large $h \to μτ$ rates with different consequences for CP violation in $h \to ττ$. Predictions for the size of the CP violating couplings require knowledge of the lepton Yukawa matrices and we discuss this in the context of two different textures considering all existing constraints.

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