EPS09s and EKS98s: Impact parameter dependent nPDF sets

In our recent study we have determined two new spatially dependent nuclear PDF (nPDF) sets, EPS09s and EKS98s. With these, the hard-process cross-sections can be calculated in different centrality classes consistently with the globally analyzed nPDFs for the first time. The sets were determined by exploiting the A-systematics of the globally fitted nPDF sets, EPS09 and EKS98. For the spatial dependence of the nPDFs we used a power series ansatz in the nuclear thickness function T_A. In this flash talk we introduce the framework, and present our NLO EPS09s-based predictions for the nuclear modification factor in four centrality classes for inclusive neutral pion production in p + Pb collisions at the LHC and for inclusive prompt photon production in d + Au collisions at RHIC at midrapidity.

Note:

4 pages, 4 figures, Contribution to the proceedings of the Quark Matter 2012, Washington D.C., August 12-18, 2012

nucleon: parton: distribution function
impact parameter: dependence
nuclear matter: effect
CERN LHC Coll
p nucleus: scattering
pi0: inclusive production
Brookhaven RHIC Coll
deuteron nucleus: scattering
photon: direct production
photon: inclusive production

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