Abstract

We present a model calculation of transverse-momentum-dependent distributions (TMDs) 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 nucleon-gluon-spectator coupling is described by an effective vertex containing two form factors. We fix the model parameters to obtain the best agreement with collinear gluon distributions extracted from global fits. We study the tomography in momentum space of gluons inside nucleons for various combinations of their polarizations. These can be used to make predictions of observables relevant for gluon TMD studies at current and future collider facilities.

Details

Title
Transverse-momentum-dependent gluon distribution functions in a spectator model
Author
Bacchetta Alessandro 1   VIAFID ORCID Logo  ; Celiberto, Francesco Giovanni 1   VIAFID ORCID Logo  ; Radici Marco 2   VIAFID ORCID Logo  ; Taels Pieter 3   VIAFID ORCID Logo 

1  Università di Pavia, Dipartimento di Fisica, Pavia, Italy (GRID:grid.8982.b) (ISNI:0000 0004 1762 5736); INFN Sezione di Pavia, Pavia, Italy (GRID:grid.470213.3) 
2  INFN Sezione di Pavia, Pavia, Italy (GRID:grid.470213.3) 
3  École Polytechnique, CNRS, I.P. Paris, Centre de Physique Théorique, Palaiseau, France (GRID:grid.10877.39) (ISNI:0000000121581279) 
Publication year
2020
Publication date
Aug 2020
Publisher
Springer Nature B.V.
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1140/epjc/s10052-020-8327-6
ProQuest document ID
2433033269
Copyright
© The Author(s) 2020. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.