New Fits for the Non-Perturbative Parameters in the CSS Resummation Formalism

TL;DR

This paper updates the non-perturbative parameters in the CSS resummation formalism for hadron collisions, providing new fitted values and discussing their universality with Tevatron data.

Contribution

It introduces revised functional forms and fitted parameters for the non-perturbative function in the CSS formalism, enhancing the modeling of hadron collision processes.

Findings

Two functional forms fitted with specific parameters.

Parameters suggest potential universality with Tevatron data.

Discussion on implications for Z boson production analysis.

Abstract

We update the non-perturbative function of the Collins-Soper- Sterman resummation formalism in hadron collisions. Two functional forms in impact parameter space are considered, one with a pure Gaussian form with two parameters and the other with an additional linear term. The results for the two parameter fit are found to be g1=0.24+0.08-0.07 GeV^2, g2=0.34+0.07-0.08 GeV^2. The results for the three parameter fit are g1=0.15+004-0.03 GeV^2, g2=0.48+0.07-0.05 GeV^2, and g3=-0.58+0.26-0.20 GeV^-1. We discuss the potential for the full Tevatron Run I Z boson data for further testing of the universality of the non-perturbative function.