General one-loop contributions to the decay H→ ν_lν_lγ

2021/06/28 by Khiem Hong Phan, Phan, Khiem Hong, Dzung Tri Tran +2 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2106.14466

openalex publication_date 2021/06/28 · openalex created_date 2023/07/19 · openalex updated_date 2026/07/28

Abstract

General one-loop contributions to the decay amplitudes H→ ν_lν_lγ are presented, considering all possible contributions of additional heavy vector gauge bosons, fermions, and charged (and also neutral) scalar particles appearing in the loop diagrams. Moreover, the results can be applied directly when extra neutrinos (apart from three ones in standard model) are taken into account in final states. Analytic results are presented in terms of Passarino-Veltman scalar functions which can be evaluated numerically using \tt LoopTools. In the standard model framework, these analytical results are generated and cross-checked with previous computations. We find that our results are well consistent with these computations. Within standard model limit, phenomenological results for the decay channels are also studied using the updated input parameters at the Large Hadron Collider.

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