Observations on dA scattering at forward rapidities

Details Observations on dA scattering at forward rapidities Observations on dA scattering at forward rapidities

2004-07-18

arxiv.org/abs/hep-ph/0407201v2

Phys.Lett. B603 (2004) 173-183

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, LaTeX, 10 figures as eps files, minor addition, version to appear in Phys.Lett.B

Scientific paper

10.1016/j.physletb.2004.10.033

We point out that the suppression in the ratio R_dAu recently observed by the BRAHMS collaboration in forward scattering is stronger than usually appreciated. This is related to the fact that at forward rapidities BRAHMS measures negatively charged hadrons and that R_dAu is defined from the ratio of dA and pp scattering cross sections. We also investigate the influence of standard shadowing on R_dAu, and the typical values of partonic momentum fractions relevant in forward scattering. We find that x_Au > 0.02 dominate in the cross section.

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