A1 Journal article (refereed)
EPPS16: nuclear parton distributions with LHC data (2017)
Eskola, K., Paakkinen, P., Paukkunen, H., & Salgado, C. A. (2017). EPPS16: nuclear parton distributions with LHC data. European Physical Journal C, 77(3), Article 163. https://doi.org/10.1140/epjc/s10052-017-4725-9
JYU authors or editors
Publication details
All authors or editors: Eskola, Kari; Paakkinen, Petja; Paukkunen, Hannu; Salgado, Carlos A.
Journal or series: European Physical Journal C
ISSN: 1434-6044
eISSN: 1434-6052
Publication year: 2017
Volume: 77
Issue number: 3
Article number: 163
Publisher: Springer
Publication country: Germany
Publication language: English
DOI: https://doi.org/10.1140/epjc/s10052-017-4725-9
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/53324
Web address where publication is available: https://arxiv.org/abs/1612.05741
Abstract
We introduce a global analysis of collinearly factorized nuclear parton distribution functions (PDFs) including, for the first time, data constraints from LHC proton–lead collisions. In comparison to our previous analysis, EPS09, where data only from charged-lepton–nucleus deep inelastic scattering (DIS), Drell–Yan (DY) dilepton production in proton–nucleus collisions and inclusive pion production in deuteron–nucleus collisions were the input, we now increase the variety of data constraints to cover also neutrino–nucleus DIS and low-mass DY production in pion–nucleus collisions. The new LHC data significantly extend the kinematic reach of the data constraints. We now allow much more freedom for the flavor dependence of nuclear effects than in other currently available analyses. As a result, especially the uncertainty estimates are more objective flavor by flavor. The neutrino DIS plays a pivotal role in obtaining a mutually consistent behavior for both up and down valence quarks, and the LHC dijet data clearly constrain gluons at large momentum fraction. Mainly for insufficient statistics, the pion–nucleus DY and heavy-gauge-boson production in proton–lead collisions impose less visible constraints. The outcome – a new set of next-to-leading order nuclear PDFs called EPPS16 – is made available for applications in high-energy nuclear collisions.
Keywords: particle physics
Free keywords: nuclear partons; nuclear parton distribution functions
Contributing organizations
Related projects
- Parton distributions and QCD matter in LHC nuclear collisions
- Eskola, Kari
- Research Council of Finland
Ministry reporting: Yes
Reporting Year: 2017
JUFO rating: 2