Distinguishing Various Models of the 125 GeV Boson in Vector Boson Fusion

TL;DR

This paper explores how vector boson fusion at the LHC can differentiate between various models of the 125 GeV boson, including the Standard Model Higgs and several beyond Standard Model theories, by analyzing their diphoton production rates.

Contribution

It demonstrates the potential of dijet-tagging in vector boson fusion to distinguish among multiple theoretical models of the 125 GeV boson.

Findings

Vector boson fusion rates vary across models.

Dijet-tagging enhances model discrimination.

Results suggest VBF can probe electroweak symmetry breaking.

Abstract

The hint of a new particle around 125 GeV at the LHC through the decay modes of diphoton and a number of others may point to quite a number of possibilities. While at the LHC the dominant production mechanism for the Higgs boson of the standard model and some other extensions is via the gluon fusion process, the alternative vector boson fusion is more sensitive to electroweak symmetry breaking through the gauge-Higgs couplings and therefore can be used to probe for models beyond the standard model. In this work, using the well known dijet-tagging technique to single out the vector boson fusion mechanism, we investigate its capability to discriminate a number of models that have been suggested to give an enhanced inclusive diphoton production rate, including the standard model Higgs boson, fermiophobic Higgs boson, Randall-Sundrum radion, inert-Higgs-doublet model, two-Higgs-doublet model, and the MSSM. The rates in vector-boson fusion can give more information of the underlying models to help distinguishing among the models.