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arXiv 2103.13665hep-ph
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非厄米汤川相互作用下希格斯玻色子$h\toτ^- τ^+\toπ^-ν_τ\,π^+{\bar ν}_τ$的衰变

Decay of the Higgs boson $h\toτ^- τ^+\toπ^-ν_τ\,π^+{\bar ν}_τ$ for a non-Hermitian Yukawa interaction

A. Yu. Korchin, V. A. Kovalchuk

备注：
12 pages, 4 figures, appolb style; v2: published version
发表信息：
Acta Phys. Polon. B 53, 1-A2 (2022)
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摘要：

研究了希格斯玻色子（$h$）衰变为一对$τ$轻子及其随后在$τ^-\to π^- ν_τ$和$τ^+\to π^+{\bar ν}_τ$通道中衰变的微分速率。假设希格斯玻色子玻色子与$τ$轻子之间的汤川相互作用包括标量（$S$）和赝标量（$PS$）耦合。考虑了$h\toτ^- τ^+\toπ^-ν_τ\,π^+{\bar ν}_τ$衰变中π介子的角分布。对于$S$和$PS$耦合的实值，已知这种衰减是$h ττ$相互作用中$\mathcal{CP}$破坏的信息源。在本文中，主要的注意力是支付这种相互作用的可能的非厄米性。分析了非厄米性对$ τ^- \to π^-ν_τ$和$τ^+ \to π^+ {\bar ν}_τ$衰变面间夹角分布以及其中一个π介子极角分布的影响。提出了对$\mathcal{CP}$破坏参数敏感的非对称性和$h ττ$相互作用的非厄米性。

英文摘要：

The differential rate of the decay of the Higgs boson ($h$) to a pair of $τ$ leptons with their subsequent decay in the $τ^-\to π^- ν_τ$ and $τ^+\to π^+{\bar ν}_τ$ channels is studied. The Yukawa interaction between the Higgs boson and the $τ$ leptons is assumed to include scalar ($S$) and pseudoscalar ($PS$) couplings. Angular distributions of the pions in the $h\toτ^- τ^+\toπ^-ν_τ\,π^+{\bar ν}_τ$ decay are considered. For real values of the $S$ and $PS$ couplings, this decay is known to be a source of information on $\mathcal{CP}$ violation in the $h ττ$ interaction. In the present paper, the main attention is paid to a possible non-Hermiticity of this interaction. Influence of non-Hermiticity on the distribution of the angle between planes of the $ τ^- \to π^-ν_τ$ and $τ^+ \to π^+ {\bar ν}_τ$ decays, and distribution of the polar angle of one of the pions are analyzed. Asymmetries sensitive to parameters of $\mathcal{CP}$ violation and non-Hermiticity of $h ττ$ interaction are proposed.

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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