# Open-source QCD analysis of nuclear parton distribution functions at NLO and NNLO

## TL;DR

This paper introduces new nuclear parton distribution functions at NLO and NNLO, derived from deep inelastic scattering data, using an open-source tool with modifications for nuclear analysis, and compares them to existing sets.

## Contribution

It provides the first comprehensive NLO and NNLO nuclear PDFs using an open-source framework with modifications for nuclear data analysis.

## Key findings

- New nPDF sets at NLO and NNLO levels.
- Comparison with existing nPDFs shows consistency.
- Uncertainty estimates highlight data limitations.

## Abstract

We present new sets of nuclear parton distribution functions (nPDFs) at next-to-leading order (NLO) and next-to-next-to-leading order (NNLO). Our analyses are based on deeply inelastic scattering data with charged-lepton and neutrino beams on nuclear targets. In addition, a set of proton baseline PDFs is fitted within the same framework with the same theoretical assumptions. The results of this global QCD analysis are compared to existing nPDF sets and to the fitted cross sections. Also, the uncertainties resulting from the limited constraining power of the included experimental data are presented. The published work is based on an open-source tool, xFitter, which has been modified to be applicable also for a nuclear PDF analysis. The required extensions of the code are discussed as well.