T-odd gluon distribution functions in a spectator model

TL;DR

This paper models T-odd gluon distributions in the nucleon using a spectator framework with a spectral function for the spectator mass, incorporating final-state interactions via gluon exchange.

Contribution

It introduces a spectator model with a spectral function to calculate T-odd gluon TMDs, including final-state interactions, which is a novel approach.

Findings

Calculated T-odd gluon distributions within the model.

Demonstrated the impact of spectral function on distributions.

Provided insights into gluon TMDs in the nucleon.

Abstract

We present a model calculation of T-odd transverse-momentum-dependent distributions of gluons in the nucleon. The model is based on the assumption that a nucleon can emit a gluon, and what remains after the emission is treated as a single spectator particle. This spectator particle is considered to be on-shell, but its mass is allowed to take a continuous range of values, described by a spectral function. The final-state interaction that is necessary to generate T-odd functions is modeled as the exchange of a single gluon between the spectator and the outgoing parton.