Abstract
AbstractWe include uncertainties due to missing higher order corrections to QCD computations (MHOU) used in the determination of parton distributions (PDFs) in the recent NNPDF4.0 set of PDFs. We use our previously published methodology, based on the treatment of MHOUs and their full correlations through a theory covariance matrix determined by scale variation, now fully incorporated in the new NNPDF theory pipeline. We assess the impact of the inclusion of MHOUs on the NNPDF4.0 central values and uncertainties, and specifically show that they lead to improved consistency of the PDF determination. PDF uncertainties on physical predictions in the data region are consequently either unchanged or moderately reduced by the inclusion of MHOUs.
Funder
Ministero dell’Università e della Ricerca
H2020 European Research Council
Science and Technology Facilities Council
Research Council of Finland
Deutsche Forschungsgemeinschaft
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Publisher
Springer Science and Business Media LLC
Reference50 articles.
1. NNPDF Collaboration, R.D. Ball et al., The path to proton structure at 1% accuracy. Eur. Phys. J. C 82(5), 428 (2022). arXiv:2109.02653
2. L. Del Debbio, T. Giani, M. Wilson, Bayesian approach to inverse problems: an application to NNPDF closure testing. Eur. Phys. J. C 82(4), 330 (2022). arXiv:2111.05787
3. NNPDF Collaboration, R.D. Ball, J. Cruz-Martinez, L. Del Debbio, S. Forte, Z. Kassabov, E.R. Nocera, J. Rojo, R. Stegeman, M. Ubiali, Response to ”Parton distributions need representative sampling”. arXiv:2211.12961
4. T.-J. Hou et al., New CTEQ global analysis of quantum chromodynamics with high-precision data from the LHC. Phys. Rev. D 103(1), 014013 (2021). arXiv:1912.10053
5. S. Bailey, T. Cridge, L.A. Harland-Lang, A.D. Martin, R.S. Thorne, Parton distributions from LHC, HERA, Tevatron and fixed target data: MSHT20 PDFs. Eur. Phys. J. C 81(4), 341 (2021). arXiv:2012.04684
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献