Torsion Discovery Potential and Its Discrimination at CERN LHC

TL;DR

This paper investigates the potential to discover and distinguish torsion fields, a class of quantum gravity models, at the CERN LHC by analyzing their resonance signatures and differentiating them from other new physics signals.

Contribution

It provides a phenomenological analysis of torsion fields at LHC, including discovery reach and discrimination strategies from neutral gauge bosons.

Findings

Determines luminosity requirements for 5σ discovery of torsion resonances.

Estimates luminosity needed to distinguish torsion from Z' signals at 95% confidence level.

Shows that with sufficient data, torsion signals can be differentiated from other new physics signals.

Abstract

Torsion models constitute a well known class of extended quantum gravity models. In this paper we study some phenomenological consequences of a torsion field interacting with fermions at LHC. A torsion field could appear as a new heavy state characterized by its mass and couplings to fermions. These new states will form a resonance decaying into difermions, as occurs in many extensions of the Standard Model, such as models predicting the existence of additional neutral gauge bosons, usually named $Z^\prime$. Using the dielectron channel we evaluate the integrated luminosity needed for a $5\sigma$ discovery as a function of the torsion mass, for different coupling values. We also calculate the luminosity needed for discriminate, with 95% C.L., the two possible different torsion natures. Finally, we show that the observed signal coming from the torsion field could be distinguished from a signal coming from a new neutral gauge boson, provided there is enough luminosity.