Applicability of pion-nucleus Drell-Yan data in global analysis of nuclear parton distribution functions

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Paakkinen , P , Eskola , K J & Paukkunen , H 2017 , ' Applicability of pion-nucleus Drell-Yan data in global analysis of nuclear parton distribution functions ' Physics Letters B , vol. 768 , pp. 7-11 . DOI: 10.1016/j.physletb.2017.02.009

Title: Applicability of pion-nucleus Drell-Yan data in global analysis of nuclear parton distribution functions
Author: Paakkinen, Petja; Eskola, Kari J.; Paukkunen, Hannu
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
Date: 2017-05-10
Number of pages: 5
Belongs to series: Physics Letters B
ISSN: 0370-2693
URI: http://hdl.handle.net/10138/208058
Abstract: Despite the success of modern nuclear parton distribution functions (nPDFs) in describing nuclear hard-process data, they still suffer from large uncertainties. One of the poorly constrained features is the possible asymmetry in nuclear modifications of valence u and d quarks. We study the possibility of using pion-nucleus Drell-Yan dilepton data as a new constraint in the global analysis of nPDFs. We find that the nuclear cross-section ratios from the NA3, NA10 and E615 experiments can be used without imposing significant new theoretical uncertainties and, in particular, that these datasets may have some constraining power on the u/d-asymmetryin nuclei. (C) 2017 The Authors. Published by Elsevier B.V.
Subject: Drell-Yan process
Pion-nucleus scattering
Nuclear parton distribution functions
DIMUON PRODUCTION
RATIO
PDFS
114 Physical sciences
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