Collider constraints on Gauss-Bonnet coupling in warped geometry model

TL;DR

This study constrains the Gauss-Bonnet coupling in a 5D warped geometry model using collider data, establishing bounds based on Higgs-like scalar observations and decay channel measurements.

Contribution

It demonstrates how phenomenological collider constraints can determine the sign and magnitude of Gauss-Bonnet coupling in warped extra-dimensional models.

Findings

Gauss-Bonnet coupling sign fixed by warp solution

Stringent bounds on coupling from Higgs decay data

Coupling constrained to (4.8 - 5.1)×10^{-7}

Abstract

In this paper the requirement of a warp solution in an Einstein-Gauss-Bonnet 5D warped geometry is shown to fix the signature of Gauss-Bonnet coupling ($\alpha_{5}$). Further, imposing the phenomenological constraints, obtained from the recently observed Higgs like scalar mass as well as $\mu$ parameter of the decay channels ${H}_{0}\rightarrow\gamma\gamma,\tau{\bar \tau}$ explored in ATLAS and CMS detectors, we obtain a stringent bound on $\alpha_{5}$ within $(4.8 - 5.1)\times 10^{-7}$.