Pion-nucleus Drell-Yan data as a novel constraint for nuclear PDFs

P. Paakkinen, K.J. Eskola, H. Paukkunen

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Sammanfattning

We have studied the prospects of using the Drell-Yan dilepton process in pion-nucleus collisions as a novel input in the global analysis of nuclear parton distribution functions (nPDFs). In a NLO QCD framework, we find the measured nuclear cross-section ratios from the NA3, NA10 and E615 experiments to be largely insensitive to the pion parton distributions and also compatible with the EPS09 and nCTEQ15 nPDFs. These data sets can thus be, and in EPPS16 have been, included in global nPDF analyses without introducing significant new theoretical uncertainties or tension with the other data. In particular, we explore the constraining power of these data sets on the possible flavour asymmetry in the valence-quark nuclear modifications. Moreover, using the COMPASS kinematics we present predictions for pion charge-difference ratio, a new measurable which could help to further constrain this asymmetry.© 2017 Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
Originalspråkengelska
Artikelnummer205
TidskriftPoS Proceedings of Science
Antal sidor4
ISSN1824-8039
StatusPublicerad - 2017
MoE-publikationstypA4 Artikel i en konferenspublikation
EvenemangInternational Workshop on Deep-Inelastic Scattering and Related Subjects - Birmingham, Storbritannien
Varaktighet: 3 apr 20177 apr 2017
Konferensnummer: 25

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