Charged Higgs Boson Mass Bounds in 2HDM-II: Impact of Vector-Like Quarks
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| Format: | Preprint |
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2024
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| _version_ | 1866917784769789952 |
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| author | Benbrik, Rachid Boukidi, Mohammed Moretti, Stefano |
| author_facet | Benbrik, Rachid Boukidi, Mohammed Moretti, Stefano |
| contents | We explore the phenomenology of charged Higgs bosons ($H^\pm$) and Vector-Like Quarks (VLQs), specifically the top-like $T$, within the Two Higgs Doublet Model Type-II (2HDM-II). We consider both a singlet VLQ $(T)$ and a doublet $(TB)$ scenario, demonstrating that the presence of VLQs influences the scalar sector, particularly by alleviating the stringent mass constraints on $H^\pm$ imposed by $B$-physics observables such as $B\to X_sγ$. This relaxation arises from modifications in the couplings between $H^\pm$ and Standard Model (SM) quarks, with the magnitude of the effect differing between the singlet and doublet cases. We further analyse the constraints from the oblique parameters $S$ and $T$ on VLQ mixing angles. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_16054 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Charged Higgs Boson Mass Bounds in 2HDM-II: Impact of Vector-Like Quarks Benbrik, Rachid Boukidi, Mohammed Moretti, Stefano High Energy Physics - Phenomenology We explore the phenomenology of charged Higgs bosons ($H^\pm$) and Vector-Like Quarks (VLQs), specifically the top-like $T$, within the Two Higgs Doublet Model Type-II (2HDM-II). We consider both a singlet VLQ $(T)$ and a doublet $(TB)$ scenario, demonstrating that the presence of VLQs influences the scalar sector, particularly by alleviating the stringent mass constraints on $H^\pm$ imposed by $B$-physics observables such as $B\to X_sγ$. This relaxation arises from modifications in the couplings between $H^\pm$ and Standard Model (SM) quarks, with the magnitude of the effect differing between the singlet and doublet cases. We further analyse the constraints from the oblique parameters $S$ and $T$ on VLQ mixing angles. |
| title | Charged Higgs Boson Mass Bounds in 2HDM-II: Impact of Vector-Like Quarks |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2409.16054 |