Threshold resummation $S$-factor in QCD: the case of unequal masses

TL;DR

This paper introduces a new relativistic Coulomb-like threshold resummation S-factor in QCD for two particles of unequal masses, derived within a quasipotential approach in a relativistic configuration framework.

Contribution

It presents a novel relativistic S-factor for unequal mass particles in QCD using a quasipotential approach, advancing threshold resummation techniques.

Findings

Derived a new relativistic Coulomb-like S-factor for unequal masses.

Framework based on quasipotential approach in relativistic configuration space.

Provides a foundation for improved QCD threshold calculations.

Abstract

The new relativistic Coulomb-like threshold resummation $S$-factor in quantum chromodynamics is obtained. The consideration is given within the framework of quasipotential approach in quantum field theory which is formulated in relativistic configuration representation for two particles of unequal masses.