文章基本信息

标题：Global reanalysis of nPDFs
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作者：K. Eskola
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2007
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：In this talk, we present the results from our recent global reanalysis of nuclear parton distribution functions (nPDFs), where the DGLAP-evolving nPDFs are constrained by nuclear hard process data from deep inelastic l+A scattering (DIS) and the Drell-Yan (DY) process in p+A collisions, and by sum rules. The main improvements over our earlier work EKS98 are the automated c 2 minimization, better controllable fit functions and possibility for error estimates. The obtained 16-parameter fit to N = 514 datapoints is good, c 2/d.o.f = 0.82. Fit quality comparison and the error estimates obtained show that the old EKS98 parametrization is fully consistent with the present automated reanalysis. Comparison with other global nPDF analyses is presented as well. Within the DGLAP framework we also discuss the possibility of incorporating a clearly stronger gluon shadowing, which is suggested by the RHIC BRAHMS data from d+Au collisions.