A4 Article in conference proceedings
EPPS16 – First nuclear PDFs to include LHC data (2017)

Eskola, K.J., Paakkinen, P., Paukkunen, H. T., & Salgado, C.A. (2017). EPPS16 – First nuclear PDFs to include LHC data. In EPS-HEP2017 : The European Physical Society Conference on High Energy Physics. Sissa. POS Proceedings of Science, 180. https://pos.sissa.it/314/180/pdf

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Publication details

All authors or editors: Eskola, K.J.; Paakkinen, Petja; Paukkunen, Hannu Tuomas; Salgado, C.A.

Parent publication: EPS-HEP2017 : The European Physical Society Conference on High Energy Physics

Journal or series: POS Proceedings of Science

eISSN: 1824-8039

Publication year: 2017

Number in series: 180

Publisher: Sissa

Publication country: Italy

Publication language: English

Persistent website address: https://pos.sissa.it/314/180/pdf

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/79680

Abstract

We present results of our recent EPPS16 global analysis of NLO nuclear parton distribution functions (nPDFs). For the first time, dijet and heavy gauge boson production data from LHC proton– lead collisions have been included in a global fit. Especially, the CMS dijets play an important role in constraining the nuclear effects in gluon distributions. With the inclusion of also neutrino– nucleus deeply-inelastic scattering and pion–nucleus Drell–Yan data and a proper treatment of isospin-corrected data, we were able to free the flavor dependence of the valence and sea quark nuclear modifications for the first time. This gives us less biased, yet larger, flavor by flavor uncertainty estimates. The EPPS16 analysis indicates no tension between the data sets used, which supports the validity of collinear factorization and universal nPDFs for nuclear hard-collision processes in the kinematical range studied.

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