Eur. Phys. J. C (2017) 77: 86
https://doi.org/10.1140/epjc/s10052-017-4648-5

Regular Article - Theoretical Physics

Nucleon parton distributions in a light-front quark model

¹ Institut für Theoretische Physik, Kepler Center for Astro and Particle Physics, Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany
² Department of Physics, Tomsk State University, Tomsk, 634050, Russia
³ Laboratory of Particle Physics, Mathematical Physics Department, Tomsk Polytechnic University, Tomsk, 634050, Russia
⁴ Departamento de Física y Centro Científico Tecnológico de Valparaíso (CCTVal), Universidad Técnica Federico Santa María, Casilla 110-V, Valparaiso, Chile

^* e-mail: lubovit@tphys.physik.uni-tuebingen.de

Received: 14 October 2016
Accepted: 26 January 2017
Published online: 9 February 2017

Abstract

Continuing our analysis of parton distributions in the nucleon, we extend our light-front quark model in order to obtain both the helicity-independent and the helicity-dependent parton distributions, analytically matching the results of global fits at the initial scale GeV; they also contain the correct Dokshitzer–Gribov–Lipatov–Altarelli–Parisi evolution. We also calculate the transverse parton, Wigner and Husimi distributions from a unified point of view, using our light-front wave functions and expressing them in terms of the parton distributions and . Our results are very relevant for the current and future program of the COMPASS experiment at SPS (CERN).