Anatomy of the Real Higgs Triplet Model
Saiyad Ashanujjaman, Sumit Banik, Guglielmo Coloretti, Andreas Crivellin, Siddharth P. Maharathy, Bruce Mellado

TL;DR
This paper investigates the properties, constraints, and collider signatures of the Standard Model extended by a real Higgs triplet, analyzing its decay modes, electroweak effects, and current experimental bounds from LHC data.
Contribution
It provides a detailed theoretical and phenomenological analysis of the Y=0 real Higgs triplet model, including decay channels, electroweak fit implications, and reinterpretation of collider searches.
Findings
The model predicts a positive shift in the W mass consistent with electroweak data.
Current LHC searches exclude charged Higgs masses below 110 GeV.
Some di-photon search regions show excesses around 152 GeV, suggesting possible signals.
Abstract
In this article, we examine the Standard Model extended by a real Higgs triplet, the SM. It contains a -even neutral Higgs () and two charged Higgs bosons (), which are quasi-degenerate in mass. We first study the theoretical constraints from vacuum stability and perturbative unitarity and then calculate the Higgs decays, including the loop-induced modes such as di-photons () and . In the limit of a small mixing between the SM Higgs and , the latter decays dominantly to and can have a sizable branching ratio to di-photon. The model predicts a positive definite shift in the mass, which agrees with the current global electroweak fit. At the Large Hadron Collider, it leads to a stau-like signature from , multi-lepton final states from $pp\to…
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Cosmology and Gravitation Theories · Distributed and Parallel Computing Systems
