Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV

Detalhes bibliográficos
Autor(a) principal: Sirunyan, A. M.
Data de Publicação: 2020
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/10183/206542
Resumo: The production of W± bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of √snn = 8.16 TeV. Measurements are performed in the W± → μ±vμ channel using a data sample corresponding to an integrated luminosity of 173.4±6.1 nb-1, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame |ημ lab|< 2.4 and transverse momentum pμT > 25 GeV/c. The W± boson differential cross sections, muon charge asymmetry, and the ratios of W± boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits.
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spelling Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2020-03-07T04:17:25Z20200370-2693http://hdl.handle.net/10183/206542001111426The production of W± bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of √snn = 8.16 TeV. Measurements are performed in the W± → μ±vμ channel using a data sample corresponding to an integrated luminosity of 173.4±6.1 nb-1, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame |ημ lab|< 2.4 and transverse momentum pμT > 25 GeV/c. The W± boson differential cross sections, muon charge asymmetry, and the ratios of W± boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits.application/pdfengPhysics letters. B. Amsterdam. Vol. 800 (Jan. 2020), 135048, 24 p.Aceleradores de partículasColisao de ions pesadosBosons WCMSHeavy ionsElectroweakW bosonpPbnPDFObservation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 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:UFRGSTEXT001111426.pdf.txt001111426.pdf.txtExtracted Texttext/plain100432http://www.lume.ufrgs.br/bitstream/10183/206542/2/001111426.pdf.txt9d0199a4270b78ccd8659f978af6db4fMD52ORIGINAL001111426.pdfTexto completo (inglês)application/pdf1170312http://www.lume.ufrgs.br/bitstream/10183/206542/1/001111426.pdf07a99c8dac14e606671dd3ec2b3f9166MD5110183/2065422023-07-22 03:40:36.928407oai:www.lume.ufrgs.br:10183/206542Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-22T06:40:36Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV
title Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV
spellingShingle Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV
Sirunyan, A. M.
Aceleradores de partículas
Colisao de ions pesados
Bosons W
CMS
Heavy ions
Electroweak
W boson
pPb
nPDF
title_short Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV
title_full Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV
title_fullStr Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV
title_full_unstemmed Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV
title_sort Observation of nuclear modifications in W± boson production in pPb collisions at √snn = 8.16 TeV
author Sirunyan, A. M.
author_facet Sirunyan, A. M.
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 Sirunyan, A. M.
Silveira, Gustavo Gil da
CMS Collaboration
dc.subject.por.fl_str_mv Aceleradores de partículas
Colisao de ions pesados
Bosons W
topic Aceleradores de partículas
Colisao de ions pesados
Bosons W
CMS
Heavy ions
Electroweak
W boson
pPb
nPDF
dc.subject.eng.fl_str_mv CMS
Heavy ions
Electroweak
W boson
pPb
nPDF
description The production of W± bosons is studied in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of √snn = 8.16 TeV. Measurements are performed in the W± → μ±vμ channel using a data sample corresponding to an integrated luminosity of 173.4±6.1 nb-1, collected by the CMS Collaboration at the LHC. The number of positively and negatively charged W bosons is determined separately in the muon pseudorapidity region in the laboratory frame |ημ lab|< 2.4 and transverse momentum pμT > 25 GeV/c. The W± boson differential cross sections, muon charge asymmetry, and the ratios of W± boson yields for the proton-going over the Pb-going beam directions are reported as a function of the muon pseudorapidity in the nucleon-nucleon centre-of-mass frame. The measurements are compared to the predictions from theoretical calculations based on parton distribution functions (PDFs) at next-to-leading-order. The results favour PDF calculations that include nuclear modifications and provide constraints on the nuclear PDF global fits.
publishDate 2020
dc.date.accessioned.fl_str_mv 2020-03-07T04:17:25Z
dc.date.issued.fl_str_mv 2020
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
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/206542
dc.identifier.issn.pt_BR.fl_str_mv 0370-2693
dc.identifier.nrb.pt_BR.fl_str_mv 001111426
identifier_str_mv 0370-2693
001111426
url http://hdl.handle.net/10183/206542
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Physics letters. B. Amsterdam. Vol. 800 (Jan. 2020), 135048, 24 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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institution UFRGS
reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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