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Investigating the Drell-Yan transverse momentum distribution in the color dipole approach

M. BétempsInstituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS, BrazilM. B. Gay DucatiInstituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS, BrazilM. V. T. MachadoInstituto de Física e Matemática, Universidade Federal de Pelotas, Caixa Postal 354, CEP 96010-090, Pelotas, RS, BrazilJ. RaufeisenLos Alamos National Laboratory, MS H846, Los Alamos, New Mexico 87545, USA

2003en

ABI

Annotatsiya

We study the influence of unitarity corrections on the Drell-Yan transverse momentum distribution within the color dipole approach. These unitarity corrections are implemented through the multiple scattering Glauber-Mueller approach, which is contrasted with a phenomenological saturation model. The process is analyzed for the center of mass energies of the BNL Relativistic Heavy Ion Collider (RHIC, $\sqrt{s}=500\mathrm{GeV})$ and of the CERN Large Hadron Collider (LHC, $\sqrt{s}=14\mathrm{TeV}).$ In addition, the results are extrapolated down to current energies of proton-proton collisions, where nonasymptotic corrections to the dipole approach are needed. It is also shown that, in the absence of saturation, the dipole approach can be related to the QCD Compton process.

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Identifikatorlar

DOI: 10.1103/physrevd.67.114008

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