# Quark Matter 2018

13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Impact of CMS dijets on EPPS16 nuclear PDFs with non-quadratic reweighting

15 May 2018, 17:00
2h 40m
First floor and third floor (Palazzo del Casinò)

### First floor and third floor

#### Palazzo del Casinò

Poster Initial state physics and approach to equilibrium

### Speaker

Petja Paakkinen (University of Jyväskylä)

### Description

The CMS measurement of the dijet pseudorapidity and transverse momentum distributions in pPb versus pp collisions at 5.02 TeV provides a direct constraint on nuclear gluon PDFs in a wide range of $x$ and $Q^2$ [CMS-PAS-HIN-16-003]. We report on the impact of these data on the EPPS16 nuclear PDFs [Eur.Phys.J. C77, 163]. For this, we have devised a non-quadratic extension of the Hessian PDF reweighting method [JHEP 1412, 100], which now more accurately reflects the impact of a dataset on PDFs. Based on the (preliminary) CMS data on the pPb/pp ratios of normalized dijet cross sections, we predict that the uncertainty in the nuclear gluon modification can be significantly reduced especially in the antishadowing region.

Content type Theory Presenter name already specified

### Primary authors

Petja Paakkinen (University of Jyväskylä) Hannu Paukkunen (University of Jyväskylä) Kari J. Eskola (University of Jyvaskyla)