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

32nd Winter Workshop on Nuclear Dynamics

Durães, F.O.^1 ; Giannini, A.V.^2 ; Gonçalves, V.P.^3 ; Navarra, F.S.^2

Curso de Física, Escola de Engenharia, Universidade Presbiteriana Mackenzie, São Paulo

CEP 01302-907, Brazil^1

Instituto de Física, Universidade de São Paulo, São Paulo, SP

CEP 05315-970, Brazil^2

Instituto de Física e Matemática, Universidade Federal de Pelotas, Pelotas, RS

CEP 96010-900, Brazil^3

关键词: Color glass condensates;    Hadron production;    Hybrid formalism;    Hydrodynamical calculations;    Phenomenological models;    Proton-nucleus collisions;    Scattering amplitudes;    Transverse momenta;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/736/1/012025/pdf
DOI  :  10.1088/1742-6596/736/1/012025

来源: IOP

【 摘 要 】

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.