Archetypal Factorization and Gluon Poles in semi-exclusive reactions

TL;DR

This paper investigates the role of gluon pole contributions in nucleon-lepton hard processes, demonstrating their dominance and deriving a new single spin asymmetry linked to these poles for experimental study.

Contribution

It introduces a novel analysis of gluon pole effects within the archetypal factorization framework and derives a new measurable asymmetry related to gluon poles.

Findings

Gluon pole contributions are dominant in the studied processes.

A new single spin asymmetry related to gluon poles is derived.

Gluon pole functions have complex sources analyzed in the paper.

Abstract

Within the archetypal factorization procedure, we study the gluon pole contributions manifesting in the nucleon-lepton hard processes of hadron production. We prove the dominant role of gluon pole contributions in the processes of such kind. We analyse the different sources of complexity associated with the gluon pole functions. As a practical application, we derive a new single spin asymmetry related directly to the gluon poles which can be studied experimentally.