# An Enhanced Threshold Resummation Formalism for Lepton Pair Production and Its Effects in the Determination of Parton Distribution Functions

## TL;DR

This paper introduces an improved resummation method for lepton pair production that aligns better with experimental data and examines its impact on the determination of parton distribution functions through global fits.

## Contribution

An enhanced resummation formalism for lepton pair production that improves agreement with data and influences global PDF fits.

## Key findings

- Enhanced resummation method agrees with LPP data in high rapidity regions.
- Threshold resummation affects the results of global PDF fits.
- The new technique improves the consistency of theoretical predictions with experimental measurements.

## Abstract

We demonstrate that theoretical predictions using current resummation techniques for the lepton pair production (LPP) rapidity and $x_F$ distributions can be inconsistent with data in high rapidity and $x_F$ kinematic regions by observing their effect in global fits of parton distribution functions (PDFs). We present an enhanced resummation technique for the LPP rapidity and $x_F$ distributions that agrees with LPP data. The enhanced resummation method is used in conjunction with threshold resummation in deep inelastic scattering (DIS) to perform two global fits of PDFs using the minimal and Borel prescriptions. The results are analyzed to determine the effect of threshold resummation on global fits of PDFs.