NNLO nuclear parton distribution functions with electroweak-boson production data from the LHC
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
Published inPhysical Review D
© Authors, 2022
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. ...
PublisherAmerican Physical Society (APS)
Publication in research information system
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Related funder(s)Academy of Finland
Funding program(s)Academy Research Fellow, AoF
Additional information about fundingThe authors acknowledge support by the state of Baden-Württemberg through bwHPC providing the possibility to run the computational calculations on the high-performance cluster and also wish to acknowledge CSC-IT Center for Science, Finland, for additional computational resources through Project No. jyy2580. Also the support from the Academy of Finland, Projects No. 308301 and No. 331545, and through the Center of Excellence in Quark Matter, is acknowledged (I. H.). Furthermore, the authors thank HQS Quantum Simulations GmbH for the supportive working environment allowing the finalization of the publication of the presented results. This work was also supported in part by the Bundesministerium für Bildung und Forschung (BMBF), Grant No. 05P18VTCA1. ...
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