Impact of hidden heavy Higgs channels of VLB-Quarks below 1 TeV in 2HDM
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
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2026
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| author | Benbrik, Rachid Berrouj, Mbark Boukidi, Mohammed Ech-chaouy, Mohamed Kahime, Kholoud Salime, Khawla |
| author_facet | Benbrik, Rachid Berrouj, Mbark Boukidi, Mohammed Ech-chaouy, Mohamed Kahime, Kholoud Salime, Khawla |
| contents | We investigate the phenomenological impact of incorporating vector-like bottom (VLB) quarks into the Type-II Two-Higgs-Doublet Model (2HDM-II). This framework introduces novel beyond-Standard-Model (BSM) decay channels $B \to Hb$, $B \to Ab$, and $B \to H^-t$, which are typically ignored by LHC pair-production searches focused on Standard Model (SM) final states ($B \to Zb$, $B \to hb$, $B \to Wt$). Our analysis reveals that these BSM pathways significantly weaken current VLB mass constraints. In the 2HDM-II alignment limit, the mass limit for a singlet $B$ shifts from approximately 1.5 TeV down to 1.34 TeV. For $(T, B)$ and $(B, Y)$ doublet configurations, the mass limits relax further to approximately 0.98 TeV, driven by the dominance of $B \to Hb$ and $B \to Ab$ decays, which can reach combined branching ratios of nearly 100\%. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_07161 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Impact of hidden heavy Higgs channels of VLB-Quarks below 1 TeV in 2HDM Benbrik, Rachid Berrouj, Mbark Boukidi, Mohammed Ech-chaouy, Mohamed Kahime, Kholoud Salime, Khawla High Energy Physics - Phenomenology We investigate the phenomenological impact of incorporating vector-like bottom (VLB) quarks into the Type-II Two-Higgs-Doublet Model (2HDM-II). This framework introduces novel beyond-Standard-Model (BSM) decay channels $B \to Hb$, $B \to Ab$, and $B \to H^-t$, which are typically ignored by LHC pair-production searches focused on Standard Model (SM) final states ($B \to Zb$, $B \to hb$, $B \to Wt$). Our analysis reveals that these BSM pathways significantly weaken current VLB mass constraints. In the 2HDM-II alignment limit, the mass limit for a singlet $B$ shifts from approximately 1.5 TeV down to 1.34 TeV. For $(T, B)$ and $(B, Y)$ doublet configurations, the mass limits relax further to approximately 0.98 TeV, driven by the dominance of $B \to Hb$ and $B \to Ab$ decays, which can reach combined branching ratios of nearly 100\%. |
| title | Impact of hidden heavy Higgs channels of VLB-Quarks below 1 TeV in 2HDM |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.07161 |