The color glass condensate and the average transverse momentum in proton-nucleus collisions

TLDR: In this article, the energy and rapidity dependence of the average transverse momentum pT in pp and pA collisions at RHIC and LHC energies in the framework of the Color Glass Condensate (CGC) formalism was computed.

Abstract: We compute the energy and rapidity dependence of the average transverse momentum pT in pp and pA collisions at RHIC and LHC energies in the framework of the Color Glass Condensate (CGC) formalism. We update previous predictions for the pT - spectra using the hybrid formalism of the CGC approach and two phenomenological models for the dipole – target scattering amplitude. We demonstrate that these models are able to describe the RHIC and LHC data for the hadron production in pp, dAu and pPb collisions at pT ≤ 20 GeV. Moreover, we present our predictions for pT and demonstrate that the ratio pT (y)=pT (y = 0) decreases with the rapidity and has a behavior similar to that predicted by hydrodynamical calculations.