Polarization-dependent observables in $H\to \ell^{+}\ell^{-} \gamma$ in the SM
Abstract
The rare three body decay of a Higgs boson to a lepton-anti lepton pair and a photon has begun to attract attention, after the first evidence for the at CMS and ATLAS, which is a sub process of . To investigate some important features of this process, we suggest that the polarized forward-backward and the photon polarization asymmetries could be useful to probe its important properties, such as the behavior of Yukawa coupling, resonance, and non-resonance contributions. Our analysis introduces a comprehensive framework to evaluate the aforementioned polarization-dependent observables. By analyzing the polarization effects of the final-state photon and lepton separately on forward-backward asymmetries, we demonstrate that loop-induced contributions play a significant role to investigate these asymmetries. Unlike the unpolarized case, where the interference effects of resonance and non-resonance effects are minimal, we show that polarization dependent observables offer a powerful tool to analyze these features of this decay mode. Furthermore, these observables can provide a handy tool for probing possible signatures of physics beyond the SM.
Keywords
Cite
@article{arxiv.2410.23685,
title = {Polarization-dependent observables in $H\to \ell^{+}\ell^{-} \gamma$ in the SM},
author = {Usman Hasan and A. Uzair and M. Junaid and Bilal Tariq and Ishtiaq Ahmed and Shahin Iqbal},
journal= {arXiv preprint arXiv:2410.23685},
year = {2025}
}