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arXiv 2402.11240hep-ph
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在 $\mathrm{U}(1)_{X} \mathrm{SSM}$ 中寻找矢量介子的带电轻子味破坏

Search for charged lepton flavor violation of vector mesons in the $\mathrm{U}(1)_{X} \mathrm{SSM}$

Xing-Xing Dong, Shu-Min Zhao, Jia-Peng Huo, Tong-Tong Wang, Yi-Tong Wang, Tai-Fu Feng

AI总结:

本文在 $\mathrm{U}(1)_{X} \mathrm{SSM}$ 框架下研究了矢量介子的带电轻子味破坏衰变,发现该模型能产生显著贡献,且分支比可达当前实验上限,是研究新物理的有效渠道。

摘要:

带电轻子味破坏(CLFV)代表超出标准模型(SM)的清晰新物理(NP)信号。在本工作中,我们在 $\mathrm{U}(1)_{X} \mathrm{SSM}$ 中研究了矢量介子的 CLFV 衰变 $V\rightarrow l_i^{\pm}l_j^{\mp}$,其中 $V\in\{\phi, J/\Psi, \Upsilon(1S), \Upsilon(2S),\Upsilon(3S)\}$。考虑到类 SM Higgs 玻色子质量在 $3\sigma$ 范围内,我们讨论了对该模型相关参数空间的相应约束,表明该模型能对此类 CLFV 衰变产生显著贡献。数值分析表明,主要敏感参数和 CLFV 来源源自对应于轻子初末代态的非对角元素。这些 CLFV 过程的分支比可以轻易达到目前的实验上限。因此,寻找矢量介子的 CLFV 过程可能是研究新物理的有效渠道。

英文摘要:

Charged lepton flavor violation (CLFV) represents a clear new physics (NP) signal beyond the standard model (SM). In this work, we investigate the CLFV decays of vector mesons $V\rightarrow l_i^{\pm}l_j^{\mp}$ with $V\in\{ϕ, J/Ψ, Υ(1S), Υ(2S),Υ(3S)\}$ in the $\mathrm{U}(1)_{X} \mathrm{SSM}$. Considering the SM-like Higgs boson mass within $3σ$ region, we discuss the corresponding constraints on the relevant parameter space of the model, which indicate this model can produce significant contributions to such CLFV decays. From the numerical analyses, the main sensitive parameters and CLFV sources originate from the non-diagonal elements correspond to the initial and final generations of the leptons. And the branching ratios to these CLFV processes can easily reach the present experimental upper bounds. Therefore, searching for CLFV processes of vector mesons may be an effective channel to study new physics.

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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