Higgs boson decays to a fermion pair and a polarized $Z$ boson at NLO accuracy
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2021
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| _version_ | 1866916559949135872 |
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| author | Chen, Zi-Qiang Feng, Qi-Ming Qiao, Cong-Feng |
| author_facet | Chen, Zi-Qiang Feng, Qi-Ming Qiao, Cong-Feng |
| contents | In this paper, we investigate the Higgs boson decay process $H\to f\bar{f}Z\to f\bar{f}μ^-μ^+$, where $f$ denotes any light fermions, at the next-to-leading order (NLO) accuracy. The calculation is performed within the framework of single-pole approximation, in which the contributions of different polarization states of the $Z$ boson are considered separately. Numerical results show that, by taking appropriate cut, the non-resonant background is negligible, and the NLO corrections are $1\%$--$4\%$ of the LO contributions. We also find that the inclusion of NLO corrections can greatly reduce the dependence on the electroweak coupling scheme, and enhance the prediction reliability. We formulate a method for the extraction of the pseudo-observable $Γ^{H\to ffZ}$ from the $f\bar{f}μ^-μ^+$ signal. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2107_04858 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Higgs boson decays to a fermion pair and a polarized $Z$ boson at NLO accuracy Chen, Zi-Qiang Feng, Qi-Ming Qiao, Cong-Feng High Energy Physics - Phenomenology In this paper, we investigate the Higgs boson decay process $H\to f\bar{f}Z\to f\bar{f}μ^-μ^+$, where $f$ denotes any light fermions, at the next-to-leading order (NLO) accuracy. The calculation is performed within the framework of single-pole approximation, in which the contributions of different polarization states of the $Z$ boson are considered separately. Numerical results show that, by taking appropriate cut, the non-resonant background is negligible, and the NLO corrections are $1\%$--$4\%$ of the LO contributions. We also find that the inclusion of NLO corrections can greatly reduce the dependence on the electroweak coupling scheme, and enhance the prediction reliability. We formulate a method for the extraction of the pseudo-observable $Γ^{H\to ffZ}$ from the $f\bar{f}μ^-μ^+$ signal. |
| title | Higgs boson decays to a fermion pair and a polarized $Z$ boson at NLO accuracy |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2107.04858 |