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Specialized minimal PDFs for optimized LHC calculations
We present a methodology for the construction of parton distribution functions (PDFs) designed to provide an accurate representation of PDF uncertainties for specific processes or classes of processes with a minimal number of PDF error sets: specialized minimal PDF sets, or SM-PDFs. We construct the...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5312169/ https://www.ncbi.nlm.nih.gov/pubmed/28260973 http://dx.doi.org/10.1140/epjc/s10052-016-4042-8 |
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author | Carrazza, Stefano Forte, Stefano Kassabov, Zahari Rojo, Juan |
author_facet | Carrazza, Stefano Forte, Stefano Kassabov, Zahari Rojo, Juan |
author_sort | Carrazza, Stefano |
collection | PubMed |
description | We present a methodology for the construction of parton distribution functions (PDFs) designed to provide an accurate representation of PDF uncertainties for specific processes or classes of processes with a minimal number of PDF error sets: specialized minimal PDF sets, or SM-PDFs. We construct these SM-PDFs in such a way that sets corresponding to different input processes can be combined without losing information, specifically as regards their correlations, and that they are robust upon smooth variations of the kinematic cuts. The proposed strategy never discards information, so that the SM-PDF sets can be enlarged by the addition of new processes, until the prior PDF set is eventually recovered for a large enough set of processes. We illustrate the method by producing SM-PDFs tailored to Higgs, top-quark pair, and electroweak gauge boson physics, and we determine that, when the PDF4LHC15 combined set is used as the prior, around 11, 4, and 11 Hessian eigenvectors, respectively, are enough to fully describe the corresponding processes. |
format | Online Article Text |
id | pubmed-5312169 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-53121692017-03-01 Specialized minimal PDFs for optimized LHC calculations Carrazza, Stefano Forte, Stefano Kassabov, Zahari Rojo, Juan Eur Phys J C Part Fields Regular Article - Theoretical Physics We present a methodology for the construction of parton distribution functions (PDFs) designed to provide an accurate representation of PDF uncertainties for specific processes or classes of processes with a minimal number of PDF error sets: specialized minimal PDF sets, or SM-PDFs. We construct these SM-PDFs in such a way that sets corresponding to different input processes can be combined without losing information, specifically as regards their correlations, and that they are robust upon smooth variations of the kinematic cuts. The proposed strategy never discards information, so that the SM-PDF sets can be enlarged by the addition of new processes, until the prior PDF set is eventually recovered for a large enough set of processes. We illustrate the method by producing SM-PDFs tailored to Higgs, top-quark pair, and electroweak gauge boson physics, and we determine that, when the PDF4LHC15 combined set is used as the prior, around 11, 4, and 11 Hessian eigenvectors, respectively, are enough to fully describe the corresponding processes. Springer Berlin Heidelberg 2016-04-15 2016 /pmc/articles/PMC5312169/ /pubmed/28260973 http://dx.doi.org/10.1140/epjc/s10052-016-4042-8 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3 |
spellingShingle | Regular Article - Theoretical Physics Carrazza, Stefano Forte, Stefano Kassabov, Zahari Rojo, Juan Specialized minimal PDFs for optimized LHC calculations |
title | Specialized minimal PDFs for optimized LHC calculations |
title_full | Specialized minimal PDFs for optimized LHC calculations |
title_fullStr | Specialized minimal PDFs for optimized LHC calculations |
title_full_unstemmed | Specialized minimal PDFs for optimized LHC calculations |
title_short | Specialized minimal PDFs for optimized LHC calculations |
title_sort | specialized minimal pdfs for optimized lhc calculations |
topic | Regular Article - Theoretical Physics |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5312169/ https://www.ncbi.nlm.nih.gov/pubmed/28260973 http://dx.doi.org/10.1140/epjc/s10052-016-4042-8 |
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