A1 Journal article (refereed)
NNLO nuclear parton distribution functions with electroweak-boson production data from the LHC (2022)
Helenius, I., Walt, M., & Vogelsang, W. (2022). NNLO nuclear parton distribution functions with electroweak-boson production data from the LHC. Physical Review D, 105(9), Article 094031. https://doi.org/10.1103/PhysRevD.105.094031
JYU authors or editors
Publication details
All authors or editors: Helenius, Ilkka; Walt, Marina; Vogelsang, Werner
Journal or series: Physical Review D
ISSN: 2470-0010
eISSN: 2470-0029
Publication year: 2022
Publication date: 24/05/2022
Volume: 105
Issue number: 9
Article number: 094031
Publisher: American Physical Society (APS)
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1103/PhysRevD.105.094031
Publication open access: Openly available
Publication channel open access: Partially open access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/82552
Publication is parallel published: https://arxiv.org/abs/2112.11904
Abstract
We present new sets of nuclear parton distribution functions (nPDFs) at next-to-leading order and next-to-next-to-leading order in perturbative QCD. Our analyses are based on deeply inelastic scattering data with charged-lepton and neutrino beams on nuclear targets, and experimental data from measurements of W±,Z boson production in p+Pb collisions at the LHC. In addition, a set of proton baseline PDFs is fitted within the same framework and with the same theoretical assumptions. The results of our global QCD analysis are compared to existing nPDF sets and to the previous nPDF set TUJU19, which was based on deep-inelastic scattering data only. Our work is performed using an open-source tool, xFitter, and the required extensions of the code are discussed as well. We find good agreement with the data included in the fit and a lower value for χ2/Ndp when performing the fit at next-to-next-to-leading order. We apply the resulting nuclear PDFs to electroweak boson production in Pb+Pb collisions at the LHC and compare the results to the most recent data from ATLAS and CMS.
Keywords: nuclear physics; particle physics; quantum chromodynamics
Contributing organizations
Related projects
- Applications of perturbative Quantum Chromo Dynamics in high-energy nuclear collisions
- Paukkunen, Hannu
- Research Council of Finland
- Monte Carlo Event generation for electron-ion colliders
- Helenius, Ilkka
- Research Council of Finland
Ministry reporting: Yes
VIRTA submission year: 2022
JUFO rating: 2