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High Energy Physics - Phenomenology

arXiv:hep-ph/0505143 (hep-ph)
[Submitted on 16 May 2005 (v1), last revised 17 Apr 2006 (this version, v2)]

Title:Using dileptons to probe the Color Glass Condensate

Authors:M. A. Betemps (CAVG/UFPel and High Energy Physics Phenomenology Group, GFPAE), M. B. Gay Ducati (High Energy Physics Phenomenology Group, GFPAE)
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Abstract: 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.
Comments: 5 pages, version to appear in Phys. Lett. B
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:hep-ph/0505143
  (or arXiv:hep-ph/0505143v2 for this version)
  https://doi.org/10.48550/arXiv.hep-ph/0505143
Related DOI: https://doi.org/10.1016/j.physletb.2006.03.021

Submission history

From: Marcos Andre Betemps [view email]
[v1] Mon, 16 May 2005 19:42:28 UTC (154 KB)
[v2] Mon, 17 Apr 2006 13:43:08 UTC (114 KB)
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