Using dileptons to probe the Color Glass Condensate

Details Using dileptons to probe the Color Glass Condensate Using dileptons to probe the Color Glass Condensate

2005-05-16

arxiv.org/abs/hep-ph/0505143v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, version to appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2006.03.021

The rapidity and transverse momentum dependence of the nuclear modification ratio for dilepton production at RHIC and LHC is presented, calculated in the Color Glass Condensate (CGC) framework. The transverse momentum ratio is compared for two distinct dilepton mass values and a suppression of the Cronin peak is verified even for large mass. The nuclear modification ratio suppression in the dilepton rapidity spectra, as obtained experimentally for hadrons at RHIC, is verified for LHC energies at large transverse momentum, although not present at RHIC energies. The ratio between LHC and RHIC nuclear modification ratios is evaluated in the CGC, showing the large saturation effects at LHC compared with the RHIC results. These results consolidate the dilepton as a most suitable observable to investigate the QCD high density approaches.

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