Determination of the theory uncertainties from missing higher orders on NNLO parton distributions with percent accuracy
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| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913416854110208 |
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| author | The NNPDF Collaboration Ball, Richard D. Barontini, Andrea Candido, Alessandro Carrazza, Stefano Cruz-Martinez, Juan Del Debbio, Luigi Forte, Stefano Giani, Tommaso Hekhorn, Felix Kassabov, Zahari Laurenti, Niccolò Magni, Giacomo Nocera, Emanuele R. Rabemananjara, Tanjona R. Rojo, Juan Schwan, Christopher Stegeman, Roy Ubiali, Maria |
| author_facet | The NNPDF Collaboration Ball, Richard D. Barontini, Andrea Candido, Alessandro Carrazza, Stefano Cruz-Martinez, Juan Del Debbio, Luigi Forte, Stefano Giani, Tommaso Hekhorn, Felix Kassabov, Zahari Laurenti, Niccolò Magni, Giacomo Nocera, Emanuele R. Rabemananjara, Tanjona R. Rojo, Juan Schwan, Christopher Stegeman, Roy Ubiali, Maria |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_10319 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Determination of the theory uncertainties from missing higher orders on NNLO parton distributions with percent accuracy The NNPDF Collaboration Ball, Richard D. Barontini, Andrea Candido, Alessandro Carrazza, Stefano Cruz-Martinez, Juan Del Debbio, Luigi Forte, Stefano Giani, Tommaso Hekhorn, Felix Kassabov, Zahari Laurenti, Niccolò Magni, Giacomo Nocera, Emanuele R. Rabemananjara, Tanjona R. Rojo, Juan Schwan, Christopher Stegeman, Roy Ubiali, Maria High Energy Physics - Phenomenology 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. |
| title | Determination of the theory uncertainties from missing higher orders on NNLO parton distributions with percent accuracy |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2401.10319 |