Probing LHC Higgs Signals from Extended Electroweak Gauge Group

TL;DR

This paper investigates how an extended electroweak gauge sector influences Higgs signal strengths at the LHC, highlighting potential enhancements in specific decay channels due to new gauge bosons and Higgs states.

Contribution

It introduces a model with extended gauge symmetry and multiple Higgs and gauge boson states, analyzing their effects on Higgs signals at the LHC.

Findings

Enhanced signal strength in $gg o h o \gamma \\gamma$ channel.

Other Higgs decay processes remain similar or suppressed compared to the Standard Model.

Presence of new gauge bosons and Higgs states affects LHC Higgs signals.

Abstract

We study the effects of the extended electroweak gauge sector on the signal strengths of the Higgs boson at the LHC. Extension of the Higgs sector associate with the extension of the electroweak gauge symmetry. In our setup, there are two neutral Higgs states ($h$, $H$) and three new gauge bosons ($W'^{\pm}$, $Z'$). We assume the lightest scalar, $h$, is what LHC found and its mass is 125 GeV. We find the enhancement of $\mu(gg \to h \to \gamma \gamma)$. On the other hand, other decay processes are same as or smaller than the SM expectation.