Optimal estimation of Higgs-Gauge Boson couplings at the future $e^+e^-$ colliders
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866912750579482624 |
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| author | Bhattacharya, Subhaditya Subba, Amir Sarkar, Abhik |
| author_facet | Bhattacharya, Subhaditya Subba, Amir Sarkar, Abhik |
| contents | The proposed $e^+e^-$ collider offers an ideal environment for precise estimation of Higgs boson properties which are of utmost importance to validate the Standard Model of particle physics. We investigate $hVV$ couplings, where $V\in \{Z,γ\}$ with single Higgs production associated with $Z$ boson at the proposed $e^+e^-$ machine with $\sqrt{s}=250$ GeV, within the Standard Model Effective Field Theory (SMEFT) framework. We employ the recoil mass of the dilepton system, to select the signal phase space, i.e, $Zh \to l^+l^-b\Bar{b}$ events. The constraints on the Wilson coefficients (WCs) are obtained using the optimal observable technique (OOT). On comparison with the current experimental limits at $68\%$ CL with $138$ fb$^{-1}$ luminosity, our limits are tighter by a factor ranging from $1.5-10$ for CP even operators, while CP-odd WCs shows comparable limits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_08893 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optimal estimation of Higgs-Gauge Boson couplings at the future $e^+e^-$ colliders Bhattacharya, Subhaditya Subba, Amir Sarkar, Abhik High Energy Physics - Phenomenology High Energy Physics - Experiment The proposed $e^+e^-$ collider offers an ideal environment for precise estimation of Higgs boson properties which are of utmost importance to validate the Standard Model of particle physics. We investigate $hVV$ couplings, where $V\in \{Z,γ\}$ with single Higgs production associated with $Z$ boson at the proposed $e^+e^-$ machine with $\sqrt{s}=250$ GeV, within the Standard Model Effective Field Theory (SMEFT) framework. We employ the recoil mass of the dilepton system, to select the signal phase space, i.e, $Zh \to l^+l^-b\Bar{b}$ events. The constraints on the Wilson coefficients (WCs) are obtained using the optimal observable technique (OOT). On comparison with the current experimental limits at $68\%$ CL with $138$ fb$^{-1}$ luminosity, our limits are tighter by a factor ranging from $1.5-10$ for CP even operators, while CP-odd WCs shows comparable limits. |
| title | Optimal estimation of Higgs-Gauge Boson couplings at the future $e^+e^-$ colliders |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2508.08893 |