Vector bileptons and the decays $h\rightarrow \gamma\gamma,Z\gamma$

TL;DR

This paper investigates how vector bileptons from the reduced minimal 331 model influence Higgs decay channels, potentially explaining LHC gamma-gamma signals and constraining model parameters based on experimental data.

Contribution

It provides a detailed analysis of vector bileptons' effects on Higgs decays, highlighting their ability to enhance or suppress specific channels and fit experimental observations.

Findings

Vector bileptons can enhance $h ightarrow \gamma\gamma$ decay width.

They can reduce $h ightarrow Z\gamma$ decay width.

Model parameters are tightly constrained by LHC data.

Abstract

Takeing into account of the constraints on the relevant parameters from the muon anomalous magnetic moment, we consider the contributions of the vector bileptons $V^{\pm}$ and $U^{\pm\pm}$ predicted by the reduced minimal 331 model to the Higgs decay channels $h \rightarrow \gamma \gamma$ and $Z\gamma$. Our numerical results show that the vector bileptons can enhance the partial width $\Gamma(h\rightarrow \gamma\gamma)$, while reduce the partial width $\Gamma(h\rightarrow Z\gamma)$, which are anti-correlated. With reasonable values of the relevant free parameters, the vector bileptons can explain the $LHC$ data for the $\gamma\gamma$ signal. If the $CMS$ data persists, the value of the free parameters $ \lambda_{2}$ and $ \lambda_{3}$ should be severe constrained.