Has saturation physics been observed in deuteron-gold collisions at RHIC?

2007/01/22 by Yacine Mehtar-Tani, Mehtar-Tani, Yacine
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0701184

4 pages, 2 figures. Talk given at 41st Rencontres de Moriond: QCD and Hadronic Interactions, La Thuile, Italy, 18-25 Mar 2006

arxiv created 2007/01/22 · arxiv updated 2009/12/01

Abstract

We have addressed the question of whether saturation (CGC) has been observed in deuteron-gold collisions at RHIC. We have made a detailed analysis of the Cronin peak characteristic of the nuclear modification factor measured for d-Au collisions at mid-rapidity. The Cronin peak which is obtained around p_t≃ 3 GeV may be reproduced at the proper height only by boosting the saturation momentum by a huge non-perturbative additional component. At forward rapidity, we get a quantitative agreement with data, reproducing hadron production spectra and the R_CP ratio using a recently developed description of the small-x physics.

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