Using final state pseudorapidities to improve<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>s</mml:mi></mml:math>-channel resonance observables at the LHC

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 center-of-mass frame, possibly using a center-edge asymmetry measurement, ${A}_{\mathrm{CE}}$. In addition, forward-backward asymmetry measurements, ${A}_{\mathrm{FB}}$, can be used to distinguish between models of extra neutral gauge bosons. In this article 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 ${A}_{\mathrm{FB}}$ and ${A}_{\mathrm{CE}}$ for several representative models.