Higgs Decay Signal Strengths in an Extended 2HDM
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912311491428352 |
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| author | Bharadwaj, Hrishabh Dahiya, Mamta Dutta, Sukanta Goyal, Ashok |
| author_facet | Bharadwaj, Hrishabh Dahiya, Mamta Dutta, Sukanta Goyal, Ashok |
| contents | The combined CMS and ATLAS analysis of \(h \to Zγ\) reveals a \(2σ\) excess over the Standard Model (SM) prediction, hinting at potential new physics. In contrast, the observed agreement of \(μ_{γγ}\) with the SM imposes stringent constraints on such extension. In this context, we investigate a Two Higgs Doublet Model (2HDM) extended by a complex scalar singlet and a vector-like lepton (VLL). This framework successfully accommodates the Higgs decay signal strengths \(μ_{{}_{W \,W^\star}}\), \( μ_{Zγ}\,\), and \(\, μ_{γγ}\) while also satisfying precision electroweak constraints, the observed experimental value of muon \(g-2\), and bounds from LEP II data. We identify a viable region of parameter space that is consistent with all low energy data and current experimental limits on the Higgs decay signal strengths. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_04265 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Higgs Decay Signal Strengths in an Extended 2HDM Bharadwaj, Hrishabh Dahiya, Mamta Dutta, Sukanta Goyal, Ashok High Energy Physics - Phenomenology High Energy Physics - Theory The combined CMS and ATLAS analysis of \(h \to Zγ\) reveals a \(2σ\) excess over the Standard Model (SM) prediction, hinting at potential new physics. In contrast, the observed agreement of \(μ_{γγ}\) with the SM imposes stringent constraints on such extension. In this context, we investigate a Two Higgs Doublet Model (2HDM) extended by a complex scalar singlet and a vector-like lepton (VLL). This framework successfully accommodates the Higgs decay signal strengths \(μ_{{}_{W \,W^\star}}\), \( μ_{Zγ}\,\), and \(\, μ_{γγ}\) while also satisfying precision electroweak constraints, the observed experimental value of muon \(g-2\), and bounds from LEP II data. We identify a viable region of parameter space that is consistent with all low energy data and current experimental limits on the Higgs decay signal strengths. |
| title | Higgs Decay Signal Strengths in an Extended 2HDM |
| topic | High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2504.04265 |