Diphoton signal via Chern-Simons interaction in a warped geometry scenario

TL;DR

This paper explores how a Chern-Simons interaction in a warped Randall-Sundrum scenario can produce a diphoton signal at the LHC, linked to a bulk torsion field acting as an axion with distinctive gauge interactions.

Contribution

It introduces a novel mechanism where a bulk torsion field's KK mode acts as an axion with observable diphoton signals due to Chern-Simons couplings in warped geometry.

Findings

Potential diphoton peak at LHC energies.

Unsuppressed gauge interactions of the axion.

Numerical consistency with electroweak scale stabilization.

Abstract

The Kalb-Ramond field, identifiable with bulk torsion in a five-dimensional Randall Sundrum (RS) scenario, has Chern-Simons interactions with gauge bosons, from the requirement of gauge anomaly cancellation. Its lowest Kaluza Klein (KK) mode on the visible 3-brane can be identified with a spin-0 CP-odd field, namely, the axion. By virtue of the warped geometry and Chern-Simons couplings, this axion has unsuppressed interactions with gauge bosons in contrast to ultra-suppressed interactions with fermions. The ensuing dynamics can lead to a peak in the diphoton spectrum, which could be observed at the LHC, subject to the prominence of the signal. Moreover, the results can be numerically justified when the warp factor is precisely in the range required for stabilization of the electroweak scale.