Improving probes of $hAA$ coupling in the Type-X two Higgs Doublet Model scenario: the crucial role of $τ$-jet charge identification
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866916299604492288 |
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| author | Mukhopadhyaya, Biswarup Samanta, Sirshendu Samui, Tousik Singh, Ritesh K. |
| author_facet | Mukhopadhyaya, Biswarup Samanta, Sirshendu Samui, Tousik Singh, Ritesh K. |
| contents | The exotic decay modes of the already discovered 125-GeV scalar into a pair of light pseudoscalars is a good probe of those new physics scenarios where such pseudoscalars exist. Searches in the mass region where the pseudoscalar ($A$) is lighter than 62.5 GeV have yielded null findings so far. No search has yet examined $m_A > 62.5$ GeV where the cross section is suppressed by the off-shell pseudoscalar. We point out a possible enhancement of the sensitivity of probing $hAA$ coupling in the context of a Type-X two Higgs doublet model. We focus on $h\to A A^{(*)} \to 4τ$, and select events with two same-sign $τ$-jets along with a pair of same-sign leptons. This enables much more effective background elimination than in the erstwhile proposed channels. Taking two values of the $ττA$ coupling into account, we obtain limits on the $hAA$ coupling that can be probed at 2$σ$ and 3$σ$ significance, for $m_A$ ranging up to 85 GeV. For $m_A < 62.5$ GeV, too, we find the probe through our suggested channel exhibits considerable improvement upon the usual $2μ2τ$-based searches conducted at the LHC. Within this region, achieving the reach of $λ_{hAA}$ coupling at 3000 fb$^{-1}$ luminosity using our strategy would require approximately $\sim$ 3.6$\times 10^{5}$ fb$^{-1}$ luminosity using conventional $2μ2τ$-based searches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_13445 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Improving probes of $hAA$ coupling in the Type-X two Higgs Doublet Model scenario: the crucial role of $τ$-jet charge identification Mukhopadhyaya, Biswarup Samanta, Sirshendu Samui, Tousik Singh, Ritesh K. High Energy Physics - Phenomenology High Energy Physics - Experiment The exotic decay modes of the already discovered 125-GeV scalar into a pair of light pseudoscalars is a good probe of those new physics scenarios where such pseudoscalars exist. Searches in the mass region where the pseudoscalar ($A$) is lighter than 62.5 GeV have yielded null findings so far. No search has yet examined $m_A > 62.5$ GeV where the cross section is suppressed by the off-shell pseudoscalar. We point out a possible enhancement of the sensitivity of probing $hAA$ coupling in the context of a Type-X two Higgs doublet model. We focus on $h\to A A^{(*)} \to 4τ$, and select events with two same-sign $τ$-jets along with a pair of same-sign leptons. This enables much more effective background elimination than in the erstwhile proposed channels. Taking two values of the $ττA$ coupling into account, we obtain limits on the $hAA$ coupling that can be probed at 2$σ$ and 3$σ$ significance, for $m_A$ ranging up to 85 GeV. For $m_A < 62.5$ GeV, too, we find the probe through our suggested channel exhibits considerable improvement upon the usual $2μ2τ$-based searches conducted at the LHC. Within this region, achieving the reach of $λ_{hAA}$ coupling at 3000 fb$^{-1}$ luminosity using our strategy would require approximately $\sim$ 3.6$\times 10^{5}$ fb$^{-1}$ luminosity using conventional $2μ2τ$-based searches. |
| title | Improving probes of $hAA$ coupling in the Type-X two Higgs Doublet Model scenario: the crucial role of $τ$-jet charge identification |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2403.13445 |