https://doi.org/10.1140/epjc/s10052-019-6793-5
Regular Article - Theoretical Physics
Nuclear uncertainties in the determination of proton PDFs
NNPDF Collaboration
1
The Higgs Centre for Theoretical Physics, University of Edinburgh, JCMB, KB, Mayfield Rd, Edinburgh, EH9 3FD, Scotland, UK
2
Nikhef Theory Group, Science Park 105, 1098 XG, Amsterdam, The Netherlands
* e-mail: enocera@nikhef.nl
Received:
22
December
2018
Accepted:
16
March
2019
Published online:
27
March
2019
We show how theoretical uncertainties due to nuclear effects may be incorporated into global fits of proton parton distribution functions (PDFs) that include deep-inelastic scattering and Drell–Yan data on nuclear targets. We specifically consider the CHORUS, NuTeV and E605 data included in the NNPDF3.1 fit, which used Pb, Fe and Cu targets, respectively. We show that the additional uncertainty in the proton PDFs due to nuclear effects is small, as expected, and in particular that the effect on the 
ratio, the total strangeness 
, and the strange valence distribution 
is negligible.
© The Author(s), 2019
