Constraints on radion in a warped extra dimension model from Higgs boson searches at the LHC

TL;DR

This paper uses LHC Higgs search data to set bounds on the radion's mass and interaction scale in the Randall-Sundrum model, finding that heavier radions impose stronger constraints on the model parameters.

Contribution

It provides the first comprehensive analysis of LHC Higgs data to constrain radion properties in warped extra dimension models.

Findings

Radion mass around 200 GeV requires mbda_ > 5 TeV

For radion mass 1 TeV, mbda_ > 2 TeV

ZZ channel searches impose the most stringent bounds

Abstract

We study constraints on the radion mass and couplings in the Randall-Sundrum model from the recent LHC data on the Standard Model (SM) Higgs boson searches. When the radion is heavy enough so that it can decay into a pair of on-shell Z-bosons, we find that the ZZ channel gives a stringent constraint. For example, if the radion mass m_\phi is 200 GeV, the scale \Lambda_\phi which characterizes the interactions of the radion with the SM fields must be larger than 5 TeV. Even for m_\phi=1 TeV, we find that the lower bound on \Lambda_\phi is 2 TeV.