A1 Journal article (refereed)
Applicability of pion–nucleus Drell–Yan data in global analysis of nuclear parton distribution functions (2017)

Paakkinen, P., Eskola, K., & Paukkunen, H. (2017). Applicability of pion–nucleus Drell–Yan data in global analysis of nuclear parton distribution functions. Physics Letters B, 768, 7-11. https://doi.org/10.1016/j.physletb.2017.02.009

JYU authors or editors

Publication details

All authors or editors: Paakkinen, Petja; Eskola, Kari; Paukkunen, Hannu

Journal or series: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Publication year: 2017

Volume: 768

Issue number: 0

Pages range: 7-11

Publisher: Elsevier B.V.

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.physletb.2017.02.009

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/53354

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-asymmetry in nuclei.

Keywords: particle physics; quarks

Free keywords: Drell–Yan process; pion–nucleus scattering; nuclear parton distribution functions

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Ministry reporting: Yes

Reporting Year: 2017

JUFO rating: 2