Determination of the theory uncertainties from missing higher orders on NNLO parton distributions with percent accuracy
Articolo
Data di Pubblicazione:
2024
Citazione:
Determination of the theory uncertainties from missing higher orders on NNLO parton distributions with percent accuracy / R.D. Ball, A. Barontini, A. Candido, S. Carrazza, J. Cruz-Martinez, L. Del Debbio, S. Forte, T. Giani, F. Hekhorn, Z. Kassabov, N. Laurenti, G. Magni, E.R. Nocera, T.R. Rabemananjara, J. Rojo, C. Schwan, R. Stegeman, M. Ubiali. - (2024 Jan 18).
Abstract:
We 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 with an ensuing moderate
reduction of PDF uncertainties at NNLO.
Tipologia IRIS:
24 - Pre-print
Keywords:
High Energy Physics - Phenomenology; High Energy Physics - Phenomenology
Elenco autori:
R.D. Ball, A. Barontini, A. Candido, S. Carrazza, J. Cruz-Martinez, L. Del Debbio, S. Forte, T. Giani, F. Hekhorn, Z. Kassabov, N. Laurenti, G. Magni, E.R. Nocera, T.R. Rabemananjara, J. Rojo, C. Schwan, R. Stegeman, M. Ubiali
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