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| Natura: | Preprint |
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2024
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| Accesso online: | https://arxiv.org/abs/2401.07289 |
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| _version_ | 1866909073042046976 |
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| author | Ma, Yan Arhrib, A. Moretti, S. Semlali, S. Wang, Y. Yan, Q. S. |
| author_facet | Ma, Yan Arhrib, A. Moretti, S. Semlali, S. Wang, Y. Yan, Q. S. |
| contents | We analyse the signature of a light Higgs boson pair in the 2-Higgs Doublet Model(2HDM) Type-X (or lepton specific) over the parameter spaces allowed by theoretical self-consistency requirements as well as the latest experimental constraints from the Large Hadron Collider (LHC), precision test data and $B$ physics. Over the viable regions of the latter, wherein the Standard Model (SM)-like Higgs boson discovered at the LHC in 2012 is the heavier CP-even state of the 2HDM, $H$, it is found that the SM-like Higgs boson can decay into a pair of the lighter CP-even Higgs boson, $h$, via the process $H\to hh$ with a Branching Ratio (BR) of $5\%-10\%$ or so, (with $2 m_h < m_H =125$ GeV). Furthermore, in the Type-X scenario, the lighter Higgs bosons $h$ can dominantly decay into two $τ$'s due to a large $\tanβ$. Therefore, the pair of lighter Higgs bosons can altogether decay into a 4 $τ$ final state. In order to suppress the huge SM background events, we confine ourself to consider the fraction of signal events with two Same-Sign (SS) $τ$'s further decaying into same sign leptons while the other two $τ$'s decay hadronically. By using Monte Carlo (MC) and Machine Learning (ML) tools, we thus focus on the analysis of the signal process $pp\to H\to hh\to τ^{+}τ^{-}τ^{+}τ^{-}\to \ell v_\ell \ell v_\ell τ_h τ_h$ (where $\ell= e, μ$ and $τ_h$ means a hadronic decay of the $τ$) and explore the feasibility of such a search at the LHC for a collision energy $\sqrt{s}=~\text{14 TeV}$ and a luminosity $\text{300}~\text{fb}^{-1}$ |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_07289 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Analysis of the $gg\to H\to hh\to4τ$ process in the 2HDM lepton specific model at the LHC Ma, Yan Arhrib, A. Moretti, S. Semlali, S. Wang, Y. Yan, Q. S. High Energy Physics - Phenomenology We analyse the signature of a light Higgs boson pair in the 2-Higgs Doublet Model(2HDM) Type-X (or lepton specific) over the parameter spaces allowed by theoretical self-consistency requirements as well as the latest experimental constraints from the Large Hadron Collider (LHC), precision test data and $B$ physics. Over the viable regions of the latter, wherein the Standard Model (SM)-like Higgs boson discovered at the LHC in 2012 is the heavier CP-even state of the 2HDM, $H$, it is found that the SM-like Higgs boson can decay into a pair of the lighter CP-even Higgs boson, $h$, via the process $H\to hh$ with a Branching Ratio (BR) of $5\%-10\%$ or so, (with $2 m_h < m_H =125$ GeV). Furthermore, in the Type-X scenario, the lighter Higgs bosons $h$ can dominantly decay into two $τ$'s due to a large $\tanβ$. Therefore, the pair of lighter Higgs bosons can altogether decay into a 4 $τ$ final state. In order to suppress the huge SM background events, we confine ourself to consider the fraction of signal events with two Same-Sign (SS) $τ$'s further decaying into same sign leptons while the other two $τ$'s decay hadronically. By using Monte Carlo (MC) and Machine Learning (ML) tools, we thus focus on the analysis of the signal process $pp\to H\to hh\to τ^{+}τ^{-}τ^{+}τ^{-}\to \ell v_\ell \ell v_\ell τ_h τ_h$ (where $\ell= e, μ$ and $τ_h$ means a hadronic decay of the $τ$) and explore the feasibility of such a search at the LHC for a collision energy $\sqrt{s}=~\text{14 TeV}$ and a luminosity $\text{300}~\text{fb}^{-1}$ |
| title | Analysis of the $gg\to H\to hh\to4τ$ process in the 2HDM lepton specific model at the LHC |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2401.07289 |