Mar 23 – 27, 2020
Brooklyn, NY
US/Eastern timezone

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

Mar 26, 2020, 9:00 AM
20m
Brooklyn, NY

Brooklyn, NY

333 Adams Street, Brooklyn, New York 11201, USA
Contributed Talk Spin Physics Spin Physics

Speaker

Francesco Giovanni Celiberto (University of Pavia and INFN)

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 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 TMD dynamics.

Primary authors

Alessandro Bacchetta (University of Pavia and INFN) Francesco Giovanni Celiberto (University of Pavia and INFN) Prof. Marco Radici (INFN, Sezione di Pavia) Dr Pieter Taels (Ecole Polytechnique, CPHT & Università di Cagliari & INFN)

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