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arXiv 2408.03705hep-ph
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95 GeV Higgs玻色子与有限温度下的自发CP破坏

A 95 GeV Higgs boson and spontaneous CP-violation at the finite temperature

Jing Gao, Jinghong Ma, Lei Wang, Haotian Xu

AI总结:

本文研究两Higgs二重态模型的复单态标量扩展,提出95.4 GeV Higgs源于三个CP偶Higgs场混合,模型在有限温度下实现自发CP破坏以解释宇宙重子不对称性及双光子和$b\ar{b}$超出,同时满足对撞机和电偶极矩约束。

摘要:

ATLAS和CMS合作组报告了在95.4 GeV附近的不变质量分布中的双光子超出,局部显著性为$3.1σ$。此外,在LEP的同一质量区域,$b\ar{b}$末态还存在另一个$2.3σ$的局部超出。一个合理的解决方案是将Higgs扇区扩展,包含一个质量为$95.4$ GeV的额外Higgs玻色子。我们研究了两Higgs二重态模型的复单态标量扩展,其中95.4 GeV的Higgs源于三个CP偶Higgs场的混合。此外,扩展的Higgs势能在有限温度下实现自发CP破坏,并在宇宙当前温度下恢复CP对称性。我们发现该模型能同时解释宇宙的重子不对称性、95.4 GeV附近的双光子和$b\ar{b}$超出,同时满足包括对撞机和电偶极矩实验在内的各种相关约束。

英文摘要:

The ATLAS and CMS collaborations reported a diphoton excess in the invariant mass distribution around the 95.4 GeV with a local significance of $3.1σ$. Moreover, there is another $2.3σ$ local excess in the $b\bar{b}$ final state at LEP in the same mass region. A plausible solution is that the Higgs sector is extended to include an additional Higgs boson with a mass of $95.4$ GeV. We study a complex singlet scalar extension of the two-Higgs-doublet model in which the 95.4 GeV Higgs is from the mixing of three CP-even Higgs fields. In addition, the extended Higgs potential can achieve spontaneous CP-violation at the finite temperature and restore CP symmetry at the present temperature of the Universe. We find that the model can simultaneously explain the baryon asymmetry of the Universe, the diphoton and $b\bar{b}$ excesses around the 95.4 GeV while satisfying various relevant constraints including the experiments of collider and electric dipole moment.

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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