Nov 25 – 29, 2019
University of Pavia
Europe/Rome timezone

A model calculation of the transverse-momentum-dependent gluon density in the proton

Nov 29, 2019, 10:00 AM
Aula Foscolo (University of Pavia)

Aula Foscolo

University of Pavia

Via Strada Nuova 65, Pavia


Francesco Giovanni Celiberto (University of Pavia and INFN)


While significant steps toward the formal definition of quark TMDs and their extraction from experimental data through global fits has been made in the last years, the gluon-TMD field represents a largely unexplored territory. Pursuing the goal of extendending our knowledge of this sector, we present analytic expressions for all $T$-even gluon TMDs at twist-2, calculated in a spectator model for the parent nucleon. At variance with respect to previous works, our approach encodes a flexible parametrization for the spectator-mass spectral density, allowing us to improve the description in the small-$x$ region.
We build a common framework where valence, sea quark and gluon densities are concurrently generated. Our results can be used to predict the behavior of observables sensitive to gluon-TMD dynamics.

Primary authors

Alessandro Bacchetta (PV) Francesco Giovanni Celiberto (University of Pavia and INFN) Marco Radici (PV) Pieter Maria Taels (Istituto Nazionale di Fisica Nucleare)

Presentation materials