Year: 2024
Type: article
Abstract: The ATLAS and CMS collaborations reported a diphoton excess in the invariant mass distribution around the 95.4 GeV with a local significance of 3.1 σ . Moreover, there is another 2.3 σ local excess in the b b ¯ 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 C P -even Higgs fields. In addition, the extended Higgs potential can achieve spontaneous C P -violation at the finite temperature and restore C P 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 b ¯ 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
Authors: Jing Gao, Xiao-Fang Han, Jinghong Ma, Lei Wang, Haotian Xu
Institution: Yantai University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Awards: G1723574634, G3998826758, G5018712052
OpenAlex ID: W4405943109