Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Carrazza, Stefano, Forte, Stefano, Kassabov, Zahari, Rojo, Juan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2016
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
_version_ 1782508152783110144
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
work_keys_str_mv AT carrazzastefano specializedminimalpdfsforoptimizedlhccalculations
AT fortestefano specializedminimalpdfsforoptimizedlhccalculations
AT kassabovzahari specializedminimalpdfsforoptimizedlhccalculations
AT rojojuan specializedminimalpdfsforoptimizedlhccalculations