Eur. Phys. J. C (2005) 43: 365-369
https://doi.org/10.1140/epjc/s2005-02264-3

Theoretical Physics

Dilepton p _T suppression in the color glass condensate

High Energy Physics Phenomenology Group, GFPAE, Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS, Brazil

Received: 21 January 2005
Revised: 19 April 2005
Published online: 8 July 2005

Abstract

Dilepton production is investigated in proton-nucleus collisions in the forward region using the color glass condensate approach. The transverse momentum distribution (p _T), more precisely the ratio between proton-nucleus and proton-proton differential cross section for LHC energies is evaluated, showing the effects of saturation at small p _T, and presenting a suppression of the Cronin type peak at moderate p _T. These features indicate the dilepton as the most suitable probe to study the properties of the saturated regime and the Cronin effect in these systems.