Lepton-Charge and Forward-Backward Asymmetries in Drell-Yan Processes for Precision Electroweak Measurements and New Physics Searches

Abstract

Precision determinations of Standard Model (SM) Electro-Weak (EW) parameters at the Large Hadron Collider (LHC) are dominated by uncertainties due to Parton Distribution Functions (PDFs). Reweighting and profiling techniques are routinely employed to treat this. We explore approaches based on combining measurements of charged current and neutral current Drell-Yan (DY) asymmetries to improve PDF uncertainties. We present the results of a numerical analysis performed with the open-source platform xFitter. PDF uncertainties are examined for lepton-charge and forward-backward asymmetries in regions of transverse and invariant masses near the vector-boson peak, based on LHC Run III and HL-LHC luminosity scenarios. We discuss the complementarity of the asymmetries in reducing PDF uncertainties in observables relevant to both SM and Beyond the SM (BSM) physics.

16 pages, 17 figures

References in corpus (5)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
• aMCfast: automation of fast NLO computations for PDF fits
• The Asymmetry of Antimatter in the Proton
• Forward-Backward Drell-Yan Asymmetry and PDF Determination

Cited by in corpus (8)

• Snowmass 2021 whitepaper: Proton structure at the precision frontier
• Parton Distributions and New Physics Searches: the Drell-Yan Forward-Backward Asymmetry as a Case Study
• ${\mathbf{Z}}^{\prime }$-boson dilepton searches and the high-$\mathbf{x}$ quark density
• Enhancing the Large Hadron Collider Sensitivity to Charged and Neutral Broad Resonances of New Gauge Sectors
• Cross-fertilising extra gauge boson searches at the LHC
• Exploring SMEFT Couplings Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production at the LHC
• Linear scaling of lepton charge asymmetry in $W^{\pm }$ production in ultra-relativistic nuclear collisions
• Tailored PDFs for New Physics searches