Differentiating the Higgs boson from the dilaton and the radion at hadron colliders

TL;DR

This paper proposes a method to distinguish the Higgs boson from the radion and dilaton in collider experiments by analyzing the ratio of specific decay channels, aiding in identifying the true nature of observed scalar particles.

Contribution

It introduces a model-independent approach using the ratio of decay cross sections to differentiate between Higgs, radion, and dilaton signals at colliders.

Findings

The ratio sigma(gamma gamma)/sigma(WW) effectively distinguishes the Higgs from radion and dilaton.

The method is independent of the specific model parameters and VEVs.

It provides a simple criterion for experimental identification of scalar particles.

Abstract

A number of candidate theories beyond the standard model (SM) predict new scalar bosons below the TeV region. Among these, the radion, which is predicted in the Randall-Sundrum model, and the dilaton, which is predicted in spontaneous scale symmetry breaking, have very similar couplings to those of the SM Higgs boson, and it is very difficult to differentiate these three spin-0 particles in the expected signals of the Higgs boson at the LHC and Tevatron. We demonstrate that the observation of the ratio sigma(gamma gamma)/sigma(WW) gives a simple and decisive way, independently of the values of model parameters: the VEVs of the radion and dilaton fields.