Complementarity of Lepton-Charge and Forward-Backward Drell-Yan Asymmetries for Precision Electroweak Measurements and Quark Density Determinations

TL;DR

This paper explores how combining lepton-charge and forward-backward Drell-Yan asymmetry measurements can improve the precision of electroweak parameters and quark density determinations by reducing PDF uncertainties.

Contribution

It demonstrates the potential of future asymmetry measurements to significantly decrease PDF uncertainties and enhance precision in SM and BSM physics analyses.

Findings

Reduced PDF uncertainties with combined asymmetry measurements

Improved precision in electroweak parameter extraction

Enhanced sensitivity to BSM effects

Abstract

We address the impact of future measurements of charged and neutral current Drell-Yan (DY) asymmetries and their combination on Parton Distribution Functions (PDFs) uncertainties. We quantify the reduction of PDF uncertainties using the QCD tool xFitter. We examine the effects of such reduced PDF errors on both Standard Model (SM) and Beyond SM (BSM) observables.