xFitter Updates: Probing Z Boson Couplings with Forward-Backward Asymmetry

TL;DR

This paper updates the xFitter framework to analyze Z boson couplings via forward-backward asymmetry in Drell-Yan processes, using simulated and future collider data to improve understanding of Z interactions.

Contribution

It introduces new methods within xFitter for probing Z boson couplings with enhanced sensitivity using forward-backward asymmetry data.

Findings

Assessments of Z boson coupling accuracy with current LHC data

Predictions for future collider sensitivities

Comparison of effective approach with existing models

Abstract

We present recent updates in the xFitter software framework for global fits of parton distribution functions in high-energy physics. Our focus is on investigating the sensitivity to Z boson couplings using the forward-backward asymmetry in Drell-Yan production. By utilizing an effective approach and simulated data, we assess the accuracy of these couplings, specifically considering the full LHC data sample. Furthermore, we compare our results with predictions for future colliders, providing insights into their potential impact on understanding Z boson interactions.