Correlating Resonant Di-Higgs and Tri-Higgs Production to $H\to VV$ in the 2HDM
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arXiv
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| Natura: | Preprint |
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2025
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| _version_ | 1866915710732599296 |
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| author | Coloretti, Guglielmo Crivellin, Andreas Haber, Howard E. |
| author_facet | Coloretti, Guglielmo Crivellin, Andreas Haber, Howard E. |
| contents | The observation of resonant di-Higgs production, which would strongly suggest the existence of a new heavy neutral scalar $H$, has been searched for extensively at the LHC. In the two-Higgs doublet model (2HDM) with $m_H\gg m_h$, where $h$ is the Higgs boson of mass 125 GeV observed at the LHC, we show that a direct correlation emerges between Br$(H\to hh)$ and Br$(H\to VV)$, with $V=Z,W$, which depends only on $m_H$ (and $m_V$). In particular, for heavy scalar masses between 500\,GeV and 1\,TeV, we find that Br($H\to hh$)/ Br($H\to ZZ)\approx 9.5$. The origin of this prediction is most transparent in the Higgs basis, where the term in the scalar potential proportional to $\mathcal H_1^\dagger \mathcal H_1 \mathcal H_1^\dagger \mathcal H_2$ (and its hermitian conjugate) generates the leading contributions to the $Hhh$ and $Hhhh$ couplings in the decoupling limit of the 2HDM. Moreover, the latter coupling governs the resonant prompt tri-Higgs production via $H\to hhh$, which is also directly correlated to $H\to hh$ (and $H\to VV$), and can yield rates large enough to be measured at the High-Luminosity LHC. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_24868 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Correlating Resonant Di-Higgs and Tri-Higgs Production to $H\to VV$ in the 2HDM Coloretti, Guglielmo Crivellin, Andreas Haber, Howard E. High Energy Physics - Phenomenology High Energy Physics - Experiment The observation of resonant di-Higgs production, which would strongly suggest the existence of a new heavy neutral scalar $H$, has been searched for extensively at the LHC. In the two-Higgs doublet model (2HDM) with $m_H\gg m_h$, where $h$ is the Higgs boson of mass 125 GeV observed at the LHC, we show that a direct correlation emerges between Br$(H\to hh)$ and Br$(H\to VV)$, with $V=Z,W$, which depends only on $m_H$ (and $m_V$). In particular, for heavy scalar masses between 500\,GeV and 1\,TeV, we find that Br($H\to hh$)/ Br($H\to ZZ)\approx 9.5$. The origin of this prediction is most transparent in the Higgs basis, where the term in the scalar potential proportional to $\mathcal H_1^\dagger \mathcal H_1 \mathcal H_1^\dagger \mathcal H_2$ (and its hermitian conjugate) generates the leading contributions to the $Hhh$ and $Hhhh$ couplings in the decoupling limit of the 2HDM. Moreover, the latter coupling governs the resonant prompt tri-Higgs production via $H\to hhh$, which is also directly correlated to $H\to hh$ (and $H\to VV$), and can yield rates large enough to be measured at the High-Luminosity LHC. |
| title | Correlating Resonant Di-Higgs and Tri-Higgs Production to $H\to VV$ in the 2HDM |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2512.24868 |