Revisiting the Higgs Boson Decay into a Photon and a Neutrino Pair
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866929372812804096 |
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| author | Kachanovich, Aliaksei Nišandžić, Ivan |
| author_facet | Kachanovich, Aliaksei Nišandžić, Ivan |
| contents | We present new calculations of the leading-order one-loop amplitude and the decay rate for $H\to ν\barν γ$ within the standard model, employing reduction to a set of basic Passarino-Veltman functions resulting in more concise expressions compared to prior works. Our result for the total decay rate is $Γ(H\to ν\barν γ)=1.33\,\text{keV}$, in close agreement with the narrow width approximation (NWA) for the intermediate Z boson. A comparison with previous results available in the literature is also provided. We evaluate the differential decay rate with respect to the energy of the photon and find that the non-resonant contributions from box diagrams beyond the NWA notably affect the kinematic region associated with high-energy photons, where the intermediate Z boson is offshell. This suggests potential implications for searches of dark sector mediators, particularly in future lepton collider experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_16239 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Revisiting the Higgs Boson Decay into a Photon and a Neutrino Pair Kachanovich, Aliaksei Nišandžić, Ivan High Energy Physics - Phenomenology We present new calculations of the leading-order one-loop amplitude and the decay rate for $H\to ν\barν γ$ within the standard model, employing reduction to a set of basic Passarino-Veltman functions resulting in more concise expressions compared to prior works. Our result for the total decay rate is $Γ(H\to ν\barν γ)=1.33\,\text{keV}$, in close agreement with the narrow width approximation (NWA) for the intermediate Z boson. A comparison with previous results available in the literature is also provided. We evaluate the differential decay rate with respect to the energy of the photon and find that the non-resonant contributions from box diagrams beyond the NWA notably affect the kinematic region associated with high-energy photons, where the intermediate Z boson is offshell. This suggests potential implications for searches of dark sector mediators, particularly in future lepton collider experiments. |
| title | Revisiting the Higgs Boson Decay into a Photon and a Neutrino Pair |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2405.16239 |