https://doi.org/10.1140/epjc/s10052-009-1225-6
Regular Article - Theoretical Physics
Testing non-linear evolution with running coupling corrections in ep and pp collisions
1
Conjunto Agrotécnico Visconde da Graça (CAVG), Universidade Federal de Pelotas, Av. Ildefonso Simes Lopes, 2791, CEP 96060-290, Pelotas, RS, Brazil
2
High and Medium Energy Group (GAME), Instituto de Física e Matemática, Universidade Federal de Pelotas, Caixa Postal 354, CEP 96010-900, Pelotas, RS, Brazil
* e-mail: barros@ufpel.edu.br
Received:
20
July
2009
Revised:
8
October
2009
Published online:
11
December
2009
Perturbative QCD predicts that the growth of the gluon density at small x (high energies) should saturate, forming a Color Glass Condensate (CGC), which is described in mean field approximation by the Balitsky–Kovchegov (BK) equation. Recently, the next-to-leading order corrections for the BK equation were derived and a global fit of the inclusive ep HERA data was performed, resulting in a parameterization for the forward scattering amplitude. In this paper we compare this parameterization with the predictions of other phenomenological models and investigate the saturation physics in diffractive deep-inelastic electron–proton scattering and in the forward hadron production in pp collisions. Our results demonstrate that the running coupling BK solution is able to describe these observables.
© Springer-Verlag / Società Italiana di Fisica, 2010