Probing an extra Higgs boson at future linear $e^+ e^-$ colliders
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| author | Hou, Wei-Shu Krab, Mohamed |
| author_facet | Hou, Wei-Shu Krab, Mohamed |
| contents | We investigate the possibility of probing an extra Higgs boson at future linear $e^+ e^-$ colliders. We consider the production process $e^+e^- \to Hν\barν$, followed by the decay $H \to W^+W^-$, where $H$ is the extra $\textit{CP}$-even Higgs boson of the general two Higgs doublet model (G2HDM). This process is governed by the $\textit{CP}$-even Higgs mixing angle, $\cosγ$, offering direct access to this parameter. We discuss constraints on $\cosγ$ using existing LHC data and test the viability of the G2HDM top-quark-driven scenario for electroweak baryogenesis. We perform a full Monte Carlo simulation of the signal and background, and show that an extra Higgs boson in the mass range $200 \leq m_H \leq 400$ GeV could be probed at high energy linear $e^+ e^-$ colliders. Promising results are found for CLIC running at 1.5 and 3 TeV collision energies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_02420 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing an extra Higgs boson at future linear $e^+ e^-$ colliders Hou, Wei-Shu Krab, Mohamed High Energy Physics - Phenomenology We investigate the possibility of probing an extra Higgs boson at future linear $e^+ e^-$ colliders. We consider the production process $e^+e^- \to Hν\barν$, followed by the decay $H \to W^+W^-$, where $H$ is the extra $\textit{CP}$-even Higgs boson of the general two Higgs doublet model (G2HDM). This process is governed by the $\textit{CP}$-even Higgs mixing angle, $\cosγ$, offering direct access to this parameter. We discuss constraints on $\cosγ$ using existing LHC data and test the viability of the G2HDM top-quark-driven scenario for electroweak baryogenesis. We perform a full Monte Carlo simulation of the signal and background, and show that an extra Higgs boson in the mass range $200 \leq m_H \leq 400$ GeV could be probed at high energy linear $e^+ e^-$ colliders. Promising results are found for CLIC running at 1.5 and 3 TeV collision energies. |
| title | Probing an extra Higgs boson at future linear $e^+ e^-$ colliders |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.02420 |