nCTEQ15 nuclear parton distributions with uncertainties

TL;DR

This paper introduces the first official nCTEQ15 nuclear parton distribution functions with uncertainties, incorporating new data and methods to improve the accuracy of nuclear PDFs.

Contribution

It provides the first nCTEQ15 nuclear PDFs with error estimates using the Hessian method and includes pion production data to better constrain gluon distributions.

Findings

nCTEQ15 PDFs include uncertainties from the Hessian method

Inclusion of RHIC pion data improves gluon PDF constraints

Comparison shows differences with other nuclear PDF sets

Abstract

We present the first official release of the nCTEQ nuclear parton distribution functions (nPDFs) with errors. The main addition to the previous nCTEQ PDFs is the introduction of PDF uncertainties based on the Hessian method. Another important improvement is the inclusion of pion production data from RHIC giving us a handle to constrain gluon PDF. In this presentation we briefly discuss the framework of our analysis and concentrate on the comparison of our results with those of other groups.