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arXiv · 1211.2130

EPS09s and EKS98s: Impact parameter dependent nPDF sets

Ilkka Helenius·Kari J. Eskola·Heli Honkanen·Carlos A. Salgado
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Abstract

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.

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Ilkka Helenius, Kari J. Eskola, Heli Honkanen, Carlos A. Salgado. 2012-11-09. EPS09s and EKS98s: Impact parameter dependent nPDF sets. https://doi.org/10.1016/j.nuclphysa.2013.02.183

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