有限温度下95gev希格斯玻色子与自发CP破坏

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2024-12-31 DOI:10.1103/physrevd.110.115045

Jing Gao, Xiao-Fang Han, Jinghong Ma, Lei Wang, Haotian Xu

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引用次数: 0

摘要

ATLAS和CMS在95.4 GeV附近的不变质量分布中发现了双光子过剩，局部显著性为3.1σ。此外，在相同质量区域内，大型正电子对撞机的bb¯终态存在2.3σ局域过剩。一个合理的解决方案是，希格斯扇区被扩展到包括一个额外的质量为95.4 GeV的希格斯玻色子。我们研究了双希格斯-双希格斯模型的一个复杂单重态标量扩展，其中95.4 GeV希格斯粒子来自三个p偶希格斯场的混合。此外，扩展希格斯势可以在有限温度下实现自发CP违背，并在宇宙当前温度下恢复CP对称性。我们发现该模型可以同时解释宇宙重子的不对称性、双光子和95.4 GeV附近的bb¯过量，同时满足包括对撞机实验和电偶极矩在内的各种相关约束。2024年由美国物理学会出版

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

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 bb¯ final state at large electron-positron collider 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 bb¯ excesses around the 95.4 GeV while satisfying various relevant constraints including the experiments of collider and electric dipole moment.

Published by the American Physical Society

2024

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来源期刊

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.