Coefficient Functions and Open Charm Production in Deep Inelastic Scattering

TL;DR

This paper addresses the issue of double counting in open charm production during deep inelastic scattering by reformulating the calculation using coefficient functions expressed through two-particle-irreducible diagrams.

Contribution

It introduces a method to resolve double counting in open charm production in DIS via a new expression for coefficient functions based on 2PI diagrams.

Findings

Double counting in open charm production can be effectively eliminated.

The new formulation improves the theoretical consistency of DIS calculations.

The approach provides a clearer separation of different contributions in the process.

Abstract

It is shown that the problem of double counting in open charm production in DIS can be solved by using the expression for DIS coefficient functions in terms of 2PI diagrams