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Apr 13 – 16, 2021
US/Eastern timezone

A model calculation of unpolarized and polarized transverse-momentum-dependent distribution functions

Apr 15, 2021, 2:10 PM
20m

Speaker

Francesco Giovanni Celiberto (ECT*/FBK Trento & INFN-TIFPA)

Description

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 extending our knowledge of this sector, we present analytic expressions for unpolarized and polarized 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 TMD dynamics.

Primary authors

Alessandro Bacchetta (University of Pavia and INFN Pavia) Francesco Giovanni Celiberto (ECT*/FBK Trento & INFN-TIFPA) Marco Radici (University of Pavia) Dr Pieter Taels (Ecole Polytechnique, CNRS, Paris)

Presentation materials