Quarkonium production at the LHC: A data-driven analysis of remarkably simple experimental patterns

Quarkonium production at the LHC: A data-driven analysis of remarkably simple experimental patterns

The LHC quarkonium production data reveal a startling observation: the J/ψ, ψ(2S), χc1, χc2 and ϒ(nS) pT-differential cross sections in the central rapidity region are compatible with one universal momentum scaling pattern. Considering also the absence of strong polarizations of directly and indirec...

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Main Authors: Pietro Faccioli, Carlos Lourenço, Mariana Araújo, Valentin Knünz, Ilse Krätschmer, João Seixas
Format: Article
Language:English
Published: Elsevier 2017-10-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269317307049
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spelling doaj-38a4606900e548539a8b55e93db49aed2020-11-24T23:20:29ZengElsevierPhysics Letters B0370-26932017-10-01773476486Quarkonium production at the LHC: A data-driven analysis of remarkably simple experimental patternsPietro Faccioli0Carlos Lourenço1Mariana Araújo2Valentin Knünz3Ilse Krätschmer4João Seixas5Physics Department, Instituto Superior Técnico (IST), Lisbon, Portugal; Laboratório de Instrumentação e Física Experimental de Partículas (LIP), Lisbon, Portugal; Corresponding authors.European Organization for Nuclear Research (CERN), Geneva, Switzerland; Corresponding authors.Physics Department, Instituto Superior Técnico (IST), Lisbon, Portugal; European Organization for Nuclear Research (CERN), Geneva, SwitzerlandEuropean Organization for Nuclear Research (CERN), Geneva, SwitzerlandInstitute of High Energy Physics (HEPHY), Vienna, AustriaPhysics Department, Instituto Superior Técnico (IST), Lisbon, Portugal; Laboratório de Instrumentação e Física Experimental de Partículas (LIP), Lisbon, PortugalThe LHC quarkonium production data reveal a startling observation: the J/ψ, ψ(2S), χc1, χc2 and ϒ(nS) pT-differential cross sections in the central rapidity region are compatible with one universal momentum scaling pattern. Considering also the absence of strong polarizations of directly and indirectly produced S-wave mesons, we conclude that there is currently no evidence of a dependence of the partonic production mechanisms on the quantum numbers and mass of the final state. The experimental observations supporting this universal production scenario are remarkably significant, as shown by a new analysis approach, unbiased by specific theoretical calculations of partonic cross sections, which are only considered a posteriori, in comparisons with the data-driven results. Keywords: Quarkonium, Polarization, NRQCD, QCD, Hadron formationhttp://www.sciencedirect.com/science/article/pii/S0370269317307049
collection DOAJ
language English
format Article
sources DOAJ
author Pietro Faccioli
Carlos Lourenço
Mariana Araújo
Valentin Knünz
Ilse Krätschmer
João Seixas
spellingShingle Pietro Faccioli
Carlos Lourenço
Mariana Araújo
Valentin Knünz
Ilse Krätschmer
João Seixas
Quarkonium production at the LHC: A data-driven analysis of remarkably simple experimental patterns
Physics Letters B
author_facet Pietro Faccioli
Carlos Lourenço
Mariana Araújo
Valentin Knünz
Ilse Krätschmer
João Seixas
author_sort Pietro Faccioli
title Quarkonium production at the LHC: A data-driven analysis of remarkably simple experimental patterns
title_short Quarkonium production at the LHC: A data-driven analysis of remarkably simple experimental patterns
title_full Quarkonium production at the LHC: A data-driven analysis of remarkably simple experimental patterns
title_fullStr Quarkonium production at the LHC: A data-driven analysis of remarkably simple experimental patterns
title_full_unstemmed Quarkonium production at the LHC: A data-driven analysis of remarkably simple experimental patterns
title_sort quarkonium production at the lhc: a data-driven analysis of remarkably simple experimental patterns
publisher Elsevier
series Physics Letters B
issn 0370-2693
publishDate 2017-10-01
description The LHC quarkonium production data reveal a startling observation: the J/ψ, ψ(2S), χc1, χc2 and ϒ(nS) pT-differential cross sections in the central rapidity region are compatible with one universal momentum scaling pattern. Considering also the absence of strong polarizations of directly and indirectly produced S-wave mesons, we conclude that there is currently no evidence of a dependence of the partonic production mechanisms on the quantum numbers and mass of the final state. The experimental observations supporting this universal production scenario are remarkably significant, as shown by a new analysis approach, unbiased by specific theoretical calculations of partonic cross sections, which are only considered a posteriori, in comparisons with the data-driven results. Keywords: Quarkonium, Polarization, NRQCD, QCD, Hadron formation
url http://www.sciencedirect.com/science/article/pii/S0370269317307049
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AT carloslourenco quarkoniumproductionatthelhcadatadrivenanalysisofremarkablysimpleexperimentalpatterns
AT marianaaraujo quarkoniumproductionatthelhcadatadrivenanalysisofremarkablysimpleexperimentalpatterns
AT valentinknunz quarkoniumproductionatthelhcadatadrivenanalysisofremarkablysimpleexperimentalpatterns
AT ilsekratschmer quarkoniumproductionatthelhcadatadrivenanalysisofremarkablysimpleexperimentalpatterns
AT joaoseixas quarkoniumproductionatthelhcadatadrivenanalysisofremarkablysimpleexperimentalpatterns
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