5-12 July 2017
Venice, Italy
Europe/Zurich timezone
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EPPS16 – First nuclear PDFs to include LHC data

7 Jul 2017, 12:15
15m
Room Mangano (Palazzo del Casinò)

Room Mangano

Palazzo del Casinò

Parallel Talk Heavy Ion Physics Heavy ion physics

Speaker

Mr Petja Paakkinen (University of Jyväskylä)

Description

We show the results of our recent global analysis of EPPS16 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 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 wide kinematical range studied.

Primary authors

Kari J. Eskola (University of Jyvaskyla) Mr Petja Paakkinen (University of Jyväskylä) Hannu Paukkunen (University of Jyväskylä) Carlos Albert Salgado Lopez (Universidade de Santiago de Compostela (ES))

Presentation Materials