Eur. Phys. J. C (2010) 65: 427-431
https://doi.org/10.1140/epjc/s10052-009-1212-y

Regular Article - Theoretical Physics

A simple model for the nuclear unintegrated gluon distribution

¹ Conjunto Agrotécnico Visconde da Graça, CAVG, Universidade Federal de Pelotas, Caixa Postal 460, 96060-290, Pelotas, RS, Brazil
² Centro de Ciências Exatas e Tecnológicas, Universidade Federal do Pampa, Campus de Bagé, Rua Carlos Barbosa, 96400-970, Bagé, RS, Brazil

^* e-mail: magnus@if.ufrgs.br

Received: 25 August 2009
Published online: 24 November 2009

Abstract

The solution of non-linear evolution equations for dense nuclear gluon density has been suggested as one of the relevant mechanisms of pA and AA collisions at collider energies. Here we study a simple parameterization for the unintegrated gluon distribution using the knowledge of asymptotic solutions of the Balitsky–Kovchegov equation, describing high-energy QCD in the presence of saturation effects. A satisfactory description of nuclear shadowing at small x is obtained and it allows us to understand the qualitative behavior shown by the data.