A4 Article in conference proceedings
Pion–nucleus Drell–Yan data as a novel constraint for nuclear PDFs (2017)

Paakkinen, P., Eskola, K., & Paukkunen, H. (2017). Pion–nucleus Drell–Yan data as a novel constraint for nuclear PDFs. In DIS 2017 : Proceedings of the 25th International Workshop on Deep-Inelastic Scattering and Related Subjects (Article 205). Sissa. PoS : Proceedings of Science, DIS2017. https://doi.org/10.22323/1.297.0205

JYU authors or editors

Publication details

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

Parent publication: DIS 2017 : Proceedings of the 25th International Workshop on Deep-Inelastic Scattering and Related Subjects

Journal or series: PoS : Proceedings of Science

ISSN: 1824-8039

eISSN: 1824-8039

Publication year: 2017

Number in series: DIS2017

Article number: 205

Publisher: Sissa

Publication country: Italy

Publication language: English

DOI: https://doi.org/10.22323/1.297.0205

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/56232

Additional information: DIS 2017 : 25th International Workshop on Deep-Inelastic Scattering and Related Subjects, 3-7 April 2017, University of Birmingham, Birmingham, UK

Abstract

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.

Free keywords: Drell–Yan dilepton process; nuclear PDFs

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Ministry reporting: Yes

Reporting Year: 2017

JUFO rating: 0