Estimating power corrections for the Drell-Yan Process

TL;DR

This paper investigates power corrections in the Drell-Yan process, focusing on bottom and charm quark effects, and emphasizes the importance of proper matching procedures to avoid double counting, especially at low energy scales.

Contribution

It introduces a comprehensive method to estimate power corrections in Drell-Yan processes, including heavy quark effects and proper matching to prevent double counting.

Findings

Power corrections are significant at low Q.

Heavy quark effects impact the predictions.

Proper matching procedures are essential.

Abstract

We study power corrections in the Drell-Yan (DY) process using state-of-the-art predictions for both neutral and charged current production. For both types of DY processes, we account for power corrections arising from bottom and charm quark effects within a variable flavor number scheme. Our results show that these corrections become significant in the low-$Q$ region. We also ensure proper treatment of overlapping contributions by carefully applying matching procedures to eliminate any double counting.