# PDF Profiling Using the Forward-Backward Asymmetry in Neutral Current Drell-Yan Production

## TL;DR

This paper explores how measurements of the Forward-Backward Asymmetry in Neutral Current Drell-Yan production at the LHC can improve the determination of Parton Distribution Functions, using the xFitter platform.

## Contribution

It introduces a novel approach to constrain PDFs by utilizing $A_{FB}$ data from NC Drell-Yan processes, expanding beyond traditional Charged Current measurements.

## Key findings

- $A_{FB}$ data can significantly impact PDF constraints.
- Thorough uncertainty analysis demonstrates the robustness of the method.
- Potential for improved non-perturbative QCD effects understanding.

## Abstract

Non-perturbative QCD effects from Parton Distribution Functions (PDFs) may be constrained by using high-statistics Large Hadron Collider (LHC) data. Drell-Yan (DY) measurements in the Charged Current (CC) case provide one of the primary means to do this, in the form of the lepton charge asymmetry. We investigate here the impact of measurements in Neutral Current (NC) DY data mapped onto the Forward-Backward Asymmetry ($A_{\rm FB}$) on PDF determinations, by using the open source fit platform {\tt{xFitter}}. We demonstrate the potential impact of $A_{\rm FB}$ data on PDF determinations and perform a thorough analysis of related uncertainties.