High-energy factorization and evolution with improved kinematics

TL;DR

This paper discusses high-energy factorization and evolution equations in QCD, emphasizing the importance of gluon saturation, analyzing large NLL corrections, and presenting resummation techniques to improve theoretical predictions.

Contribution

It introduces improved kinematic treatments in high-energy factorization and provides new resummation results for large corrections in evolution equations.

Findings

Resummation of large NLL corrections improves theoretical accuracy.

Gluon saturation effects are crucial for accurate high-energy predictions.

Kinematic approximations significantly influence evolution equations.

Abstract

The high-energy factorization and the associated B-JIMWLK or BK evolution equations are presented, using the example of DIS structure functions. The necessity of taking gluon saturation into account is discussed, and also the various approximations underlying high-energy factorization. The appearance of large NLL corrections in such a framework with or without gluon saturation is recalled, and their physical origin is explained. Finally, old and new results are presented about the resummation of some of those large corrections, related to kinematical approximations.