Infrared divergences and non-lightlike eikonal lines in Sudakov processes
J.C. Collins, F. Hautmann
TL;DR
This paper introduces a method to analyze infrared divergences in non-inclusive QCD processes using the Sudakov form factor, employing renormalization techniques and non-lightlike Wilson lines to construct counterterms.
Contribution
It presents a novel approach to handle infrared divergences in non-inclusive processes by relating soft and collinear contributions to non-lightlike eikonal Wilson lines.
Findings
Counterterms for infrared contributions are constructed using renormalization techniques.
The method clarifies the role of non-lightlike Wilson lines in Sudakov processes.
The approach provides a systematic way to analyze infrared effects in QCD.
Abstract
We propose a method to analyze infrared contributions to non-inclusive processes in QCD. We use the one-loop Sudakov form factor as a working example. Borrowing techniques from renormalization theory, we construct counterterms for the contributions from the soft and collinear regions, and we relate them to eikonal Wilson lines taken along non-lightlike directions.
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