Nuclear modification of Y states in pPb collisions at √snn = 5.02 TeV

Detalhes bibliográficos
Autor(a) principal: Tumasyan, Armen
Data de Publicação: 2022
Outros Autores: Silveira, Gustavo Gil da, CMS Collaboration
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/257851
Resumo: Production cross sections of Υ(1S), Υ(2S), and Υ(3S) states decaying into μ+μ− in proton-lead (pPb) collisions are reported using data collected by the CMS experiment at √sNN = 5.02 TeV. A comparison is made with corresponding cross sections obtained with pp data measured at the same collision energy and scaled by the Pb nucleus mass number. The nuclear modification factor for Υ(1S) is found to be RpPb(Υ(1S)) = 0.806 ±0.024 (stat) ±0.059 (syst). Similar results for the excited states indicate a sequential suppression pattern, such that RpPb(Υ(1S)) > RpPb(Υ(2S)) > RpPb(Υ(3S)). The suppression of all states is much less pronounced in pPb than in PbPb collisions, and independent of transverse momentum pΥ T and center-of-mass rapidity yΥ CM of the individual Υ state in the studied range pΥ T < 30 GeV/c and |yΥ CM| < 1.93. Models that incorporate final-state effects of bottomonia in pPb collisions are in better agreement with the data than those which only assume initial-state modifications.
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spelling Tumasyan, ArmenSilveira, Gustavo Gil daCMS Collaboration2023-05-10T03:26:54Z20220370-2693http://hdl.handle.net/10183/257851001164039Production cross sections of Υ(1S), Υ(2S), and Υ(3S) states decaying into μ+μ− in proton-lead (pPb) collisions are reported using data collected by the CMS experiment at √sNN = 5.02 TeV. A comparison is made with corresponding cross sections obtained with pp data measured at the same collision energy and scaled by the Pb nucleus mass number. The nuclear modification factor for Υ(1S) is found to be RpPb(Υ(1S)) = 0.806 ±0.024 (stat) ±0.059 (syst). Similar results for the excited states indicate a sequential suppression pattern, such that RpPb(Υ(1S)) > RpPb(Υ(2S)) > RpPb(Υ(3S)). The suppression of all states is much less pronounced in pPb than in PbPb collisions, and independent of transverse momentum pΥ T and center-of-mass rapidity yΥ CM of the individual Υ state in the studied range pΥ T < 30 GeV/c and |yΥ CM| < 1.93. Models that incorporate final-state effects of bottomonia in pPb collisions are in better agreement with the data than those which only assume initial-state modifications.application/pdfengPhysics letters. B. Amsterdam. Vol. 835 (Dec. 2022), 137397, 28 p.Aceleradores de partículasColisao de ions pesadosMésons YCMSBottomoniumQuarkonium suppressionQuark gluon plasmaHeavy ion collisionsNuclear modification of Y states in pPb collisions at √snn = 5.02 TeVEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001164039.pdf.txt001164039.pdf.txtExtracted Texttext/plain111283http://www.lume.ufrgs.br/bitstream/10183/257851/2/001164039.pdf.txt3aaaa4f34395f33a3e9ba21dba54b60eMD52ORIGINAL001164039.pdfTexto completo (inglês)application/pdf1256710http://www.lume.ufrgs.br/bitstream/10183/257851/1/001164039.pdf53550a41de4aa7818961b19a63d76442MD5110183/2578512023-07-22 03:39:08.099098oai:www.lume.ufrgs.br:10183/257851Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-22T06:39:08Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Nuclear modification of Y states in pPb collisions at √snn = 5.02 TeV
title Nuclear modification of Y states in pPb collisions at √snn = 5.02 TeV
spellingShingle Nuclear modification of Y states in pPb collisions at √snn = 5.02 TeV
Tumasyan, Armen
Aceleradores de partículas
Colisao de ions pesados
Mésons Y
CMS
Bottomonium
Quarkonium suppression
Quark gluon plasma
Heavy ion collisions
title_short Nuclear modification of Y states in pPb collisions at √snn = 5.02 TeV
title_full Nuclear modification of Y states in pPb collisions at √snn = 5.02 TeV
title_fullStr Nuclear modification of Y states in pPb collisions at √snn = 5.02 TeV
title_full_unstemmed Nuclear modification of Y states in pPb collisions at √snn = 5.02 TeV
title_sort Nuclear modification of Y states in pPb collisions at √snn = 5.02 TeV
author Tumasyan, Armen
author_facet Tumasyan, Armen
Silveira, Gustavo Gil da
CMS Collaboration
author_role author
author2 Silveira, Gustavo Gil da
CMS Collaboration
author2_role author
author
dc.contributor.author.fl_str_mv Tumasyan, Armen
Silveira, Gustavo Gil da
CMS Collaboration
dc.subject.por.fl_str_mv Aceleradores de partículas
Colisao de ions pesados
Mésons Y
topic Aceleradores de partículas
Colisao de ions pesados
Mésons Y
CMS
Bottomonium
Quarkonium suppression
Quark gluon plasma
Heavy ion collisions
dc.subject.eng.fl_str_mv CMS
Bottomonium
Quarkonium suppression
Quark gluon plasma
Heavy ion collisions
description Production cross sections of Υ(1S), Υ(2S), and Υ(3S) states decaying into μ+μ− in proton-lead (pPb) collisions are reported using data collected by the CMS experiment at √sNN = 5.02 TeV. A comparison is made with corresponding cross sections obtained with pp data measured at the same collision energy and scaled by the Pb nucleus mass number. The nuclear modification factor for Υ(1S) is found to be RpPb(Υ(1S)) = 0.806 ±0.024 (stat) ±0.059 (syst). Similar results for the excited states indicate a sequential suppression pattern, such that RpPb(Υ(1S)) > RpPb(Υ(2S)) > RpPb(Υ(3S)). The suppression of all states is much less pronounced in pPb than in PbPb collisions, and independent of transverse momentum pΥ T and center-of-mass rapidity yΥ CM of the individual Υ state in the studied range pΥ T < 30 GeV/c and |yΥ CM| < 1.93. Models that incorporate final-state effects of bottomonia in pPb collisions are in better agreement with the data than those which only assume initial-state modifications.
publishDate 2022
dc.date.issued.fl_str_mv 2022
dc.date.accessioned.fl_str_mv 2023-05-10T03:26:54Z
dc.type.driver.fl_str_mv Estrangeiro
info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/257851
dc.identifier.issn.pt_BR.fl_str_mv 0370-2693
dc.identifier.nrb.pt_BR.fl_str_mv 001164039
identifier_str_mv 0370-2693
001164039
url http://hdl.handle.net/10183/257851
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Physics letters. B. Amsterdam. Vol. 835 (Dec. 2022), 137397, 28 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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