Using Final State Pseudorapidities to Improve s-channel Resonance Observables at the LHC

TL;DR

This paper proposes using final state particle pseudorapidities to enhance the measurement of s-channel resonance properties at the LHC, improving model discrimination and spin determination.

Contribution

It introduces simple pseudorapidity-based methods to improve the accuracy of asymmetry measurements for s-channel resonance analysis at the LHC.

Findings

Enhanced A_FB and A_CE measurement precision

Improved model discrimination capabilities

Effective spin determination techniques

Abstract

We study the use of final state particle pseudorapidity for measurements of s-channel resonances at the LHC. Distinguishing the spin of an s-channel resonance can, in principle, be accomplished using angular distributions in the centre-of-mass frame, possibly using a centre-edge asymmetry measurement, A_CE. In addition, forward-backward asymmetry measurements, A_FB, can be used to distinguish between models of extra neutral gauge bosons. In this note we show how these measurements can be improved by using simple methods based on the pseudorapidity of the final state particles and present the expected results for A_FB and A_CE for several representative models.