Nonperturbative Effect in Threshold Resummation

TL;DR

This paper demonstrates that incorporating non-perturbative corrections into threshold resummation improves the description of low energy Drell-Yan data, with corrections being small at high energies like Tevatron and LHC.

Contribution

It introduces a method to include non-perturbative effects in threshold resummation, enhancing the accuracy of low energy Drell-Yan process predictions.

Findings

Non-perturbative corrections are essential for accurate low energy Drell-Yan data modeling.

Corrections are small for high invariant mass Drell-Yan pairs at Tevatron and LHC.

Threshold resummation alone is insufficient without non-perturbative terms.

Abstract

We show that the conventional threshold resummation calculation cannot describe well the low energy Drell-Yan (DY) data without including the non-perturbative correction terms which are deduced from analyzing the asymptotic behavior of the resummation formalism. It is demonstrated that the non-perturbative correction is generally small for the large invariant mass DY pairs produced at the Tevatron and the LHC.