Higgs Bosons at 95 and 125 GeV in the $U(1)_X$VLFM
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866918470510182400 |
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| author | Sun, Rong-Zhi Zhao, Shu-Min Cao, Meng-Zi Gao, Song Dong, Xing-Xing |
| author_facet | Sun, Rong-Zhi Zhao, Shu-Min Cao, Meng-Zi Gao, Song Dong, Xing-Xing |
| contents | We present a systematic analysis of the Higgs signal strengths at 125 GeV and 95 GeV in a non-supersymmetric $U(1)_X$ model with vector-like fermions ($U(1)_X$VLFM). This model extends the SM by introducing an additional $U(1)_X$ gauge symmetry, three right-handed neutrinos, two singlet Higgs fields ($ϕ$ and $S$), and one generation of vector-like quarks and leptons. The scalar fields mix with each other in the neutral CP-even sector, leading to two Higgs-like states around 95 GeV and 125 GeV. A $χ^2$ analysis is performed by combining the Higgs signal strength measurements at 125 GeV from ATLAS and CMS, including the $γγ$, $WW^*$, $ZZ^*$, $b\bar{b}$, and $τ\barτ$ channels, with the 95 GeV excesses observed in the diphoton and $b\bar{b}$ final states reported by CMS and LEP. Our results indicate that the $U(1)_X$VLFM can successfully reproduce the observed signal strengths of the 125 GeV Higgs while simultaneously explaining the 95 GeV excess. The parameters $g_X$, $g_{YX}$, $v_S$, $v_P$, and the new Yukawa couplings play a crucial role in achieving this consistency. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_06781 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Higgs Bosons at 95 and 125 GeV in the $U(1)_X$VLFM Sun, Rong-Zhi Zhao, Shu-Min Cao, Meng-Zi Gao, Song Dong, Xing-Xing High Energy Physics - Phenomenology We present a systematic analysis of the Higgs signal strengths at 125 GeV and 95 GeV in a non-supersymmetric $U(1)_X$ model with vector-like fermions ($U(1)_X$VLFM). This model extends the SM by introducing an additional $U(1)_X$ gauge symmetry, three right-handed neutrinos, two singlet Higgs fields ($ϕ$ and $S$), and one generation of vector-like quarks and leptons. The scalar fields mix with each other in the neutral CP-even sector, leading to two Higgs-like states around 95 GeV and 125 GeV. A $χ^2$ analysis is performed by combining the Higgs signal strength measurements at 125 GeV from ATLAS and CMS, including the $γγ$, $WW^*$, $ZZ^*$, $b\bar{b}$, and $τ\barτ$ channels, with the 95 GeV excesses observed in the diphoton and $b\bar{b}$ final states reported by CMS and LEP. Our results indicate that the $U(1)_X$VLFM can successfully reproduce the observed signal strengths of the 125 GeV Higgs while simultaneously explaining the 95 GeV excess. The parameters $g_X$, $g_{YX}$, $v_S$, $v_P$, and the new Yukawa couplings play a crucial role in achieving this consistency. |
| title | Higgs Bosons at 95 and 125 GeV in the $U(1)_X$VLFM |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.06781 |