Probing the low mass pseudoscalar in flipped Two Higgs Doublet Model
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866912678745735168 |
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| author | Ghosh, Dilip Kumar Mukhopadhyaya, Biswarup Samanta, Sirshendu Singh, Ritesh K. |
| author_facet | Ghosh, Dilip Kumar Mukhopadhyaya, Biswarup Samanta, Sirshendu Singh, Ritesh K. |
| contents | The phenomenology of the flipped two-Higgs-doublet model (2HDM) is relatively less explored so far, as compared to the other, commonly discussed, types. It is found that this scenario, like several others, admits of a light neutral pseudoscalar $A$ in the mass range 20 - 60 GeV, consistently with all current experimental data and theoretical constraints. However, the fact that such a pseudoscalar decays overwhelmingly into a $b\bar{b}$ pair makes its identification at the Large Hadron Collider (LHC) a challenging task. After identifying the region of the flipped 2HDM parameter space yielding a light pseudoscalar, we identify a useful search channel in the process $pp \rightarrow A Z(Z^{*}) \rightarrow b\bar{b} \ell^+ \ell^-$. A cut-based analysis, followed by one based on Boosted Decision Trees, shows that the light-$A$ scenario in flipped 2HDM should be detectable with rather high statistical significance at the high-luminosity LHC run, even after including systematic uncertainties. Furthermore, part of the parameter space, especially around $m_A = 30 - 40$ GeV is amenable to detection at the discovery level within Run-2 itself. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_15187 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing the low mass pseudoscalar in flipped Two Higgs Doublet Model Ghosh, Dilip Kumar Mukhopadhyaya, Biswarup Samanta, Sirshendu Singh, Ritesh K. High Energy Physics - Phenomenology The phenomenology of the flipped two-Higgs-doublet model (2HDM) is relatively less explored so far, as compared to the other, commonly discussed, types. It is found that this scenario, like several others, admits of a light neutral pseudoscalar $A$ in the mass range 20 - 60 GeV, consistently with all current experimental data and theoretical constraints. However, the fact that such a pseudoscalar decays overwhelmingly into a $b\bar{b}$ pair makes its identification at the Large Hadron Collider (LHC) a challenging task. After identifying the region of the flipped 2HDM parameter space yielding a light pseudoscalar, we identify a useful search channel in the process $pp \rightarrow A Z(Z^{*}) \rightarrow b\bar{b} \ell^+ \ell^-$. A cut-based analysis, followed by one based on Boosted Decision Trees, shows that the light-$A$ scenario in flipped 2HDM should be detectable with rather high statistical significance at the high-luminosity LHC run, even after including systematic uncertainties. Furthermore, part of the parameter space, especially around $m_A = 30 - 40$ GeV is amenable to detection at the discovery level within Run-2 itself. |
| title | Probing the low mass pseudoscalar in flipped Two Higgs Doublet Model |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2505.15187 |