Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-02-02
Phys.Lett.B562:36-44,2003
Physics
Nuclear Physics
Nuclear Theory
15 pages, 4 eps figures. Final version to appear in Phys.Lett.B
Scientific paper
10.1016/S0370-2693(03)00535-5
The impact parameter and rapidity dependence of the Cronin effect for massless pions in $d+Au$ reactions at $\sqrt{s}_{NN}=200$ GeV at RHIC is computed in the framework of pQCD multiple elastic scattering on a nuclear target. We introduce a formalism to incorporate initial state energy loss in perturbative calculations and take into account the elastic energy loss in addition to the transverse momentum broadening of partons.We argue that the centrality dependence of the Cronin effect can distinguish between different hadron production scenarios at RHIC. Its magnitude and rapidity dependence are shown to carry important experimental information about the properties of cold nuclear matter up to the moderate- and large-$x$ antishadowing/EMC regions.
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