Next generation proton PDFs with deuteron and nuclear uncertainties
As data become more precise, estimating theoretical uncertainties in global PDF determinations is likely to become increasingly necessary to obtain correspondingly precise PDFs. Here we present a next generation of global proton PDFs (NNPDF4.0) that include theoretical uncertainties due to the us...
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| Format: | Article |
| Language: | English |
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SciPost
2022-07-01
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| Series: | SciPost Physics Proceedings |
| Online Access: | https://scipost.org/SciPostPhysProc.8.026 |
| _version_ | 1811219233663614976 |
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| author | Rosalyn L. Pearson, Richard D. Ball, Emanuele R. Nocera |
| author_facet | Rosalyn L. Pearson, Richard D. Ball, Emanuele R. Nocera |
| author_sort | Rosalyn L. Pearson, Richard D. Ball, Emanuele R. Nocera |
| collection | DOAJ |
| description | As data become more precise, estimating theoretical uncertainties in global
PDF determinations is likely to become increasingly necessary to obtain
correspondingly precise PDFs. Here we present a next generation of global
proton PDFs (NNPDF4.0) that include theoretical uncertainties due to the use of
heavy nuclear and deuteron data in the fit. We estimate these uncertainties by
comparing the values of the nuclear observables computed with the nuclear PDFs
against those computed with proton PDFs. For heavy nuclear PDFs we use the
nuclear nNNPDF2.0 set, while for deuteron PDFs we develop an iterative
procedure to determine proton and deuteron PDFs simultaneously, each including
the uncertainties in the other. Accounting for nuclear uncertainties resolves
some of the tensions in the global fit of the proton PDFs, especially those
between the nuclear data and the extended LHC data set used in NNPDF4.0. |
| first_indexed | 2024-04-12T07:22:38Z |
| format | Article |
| id | doaj.art-4e12a6fb2213417d92a9fdb0d293c017 |
| institution | Directory Open Access Journal |
| issn | 2666-4003 |
| language | English |
| last_indexed | 2024-04-12T07:22:38Z |
| publishDate | 2022-07-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics Proceedings |
| spelling | doaj.art-4e12a6fb2213417d92a9fdb0d293c0172022-12-22T03:42:16ZengSciPostSciPost Physics Proceedings2666-40032022-07-01802610.21468/SciPostPhysProc.8.026Next generation proton PDFs with deuteron and nuclear uncertaintiesRosalyn L. Pearson, Richard D. Ball, Emanuele R. NoceraAs data become more precise, estimating theoretical uncertainties in global PDF determinations is likely to become increasingly necessary to obtain correspondingly precise PDFs. Here we present a next generation of global proton PDFs (NNPDF4.0) that include theoretical uncertainties due to the use of heavy nuclear and deuteron data in the fit. We estimate these uncertainties by comparing the values of the nuclear observables computed with the nuclear PDFs against those computed with proton PDFs. For heavy nuclear PDFs we use the nuclear nNNPDF2.0 set, while for deuteron PDFs we develop an iterative procedure to determine proton and deuteron PDFs simultaneously, each including the uncertainties in the other. Accounting for nuclear uncertainties resolves some of the tensions in the global fit of the proton PDFs, especially those between the nuclear data and the extended LHC data set used in NNPDF4.0.https://scipost.org/SciPostPhysProc.8.026 |
| spellingShingle | Rosalyn L. Pearson, Richard D. Ball, Emanuele R. Nocera Next generation proton PDFs with deuteron and nuclear uncertainties SciPost Physics Proceedings |
| title | Next generation proton PDFs with deuteron and nuclear uncertainties |
| title_full | Next generation proton PDFs with deuteron and nuclear uncertainties |
| title_fullStr | Next generation proton PDFs with deuteron and nuclear uncertainties |
| title_full_unstemmed | Next generation proton PDFs with deuteron and nuclear uncertainties |
| title_short | Next generation proton PDFs with deuteron and nuclear uncertainties |
| title_sort | next generation proton pdfs with deuteron and nuclear uncertainties |
| url | https://scipost.org/SciPostPhysProc.8.026 |
| work_keys_str_mv | AT rosalynlpearsonricharddballemanuelernocera nextgenerationprotonpdfswithdeuteronandnuclearuncertainties |