Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at √sNN=8.16 TeV
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/218641 |
Resumo: | Event-by-event long-range correlations of azimuthal anisotropy Fourier coefficients (vn) in 8.16 TeV pPb data, collected by the CMS experiment at the CERN Large Hadron Collider, are extracted using a subevent four-particle cumulant technique applied to very low multiplicity events. Each combination of four charged particles is selected from either two, three, or four distinct subevent regions of a pseudorapidity range from −2.4 to 2.4 of the CMS tracker, and with transverse momentum between 0.3 and 3.0 GeV. Using the subevent cumulant technique, correlations between vn of different orders are measured as functions of particle multiplicity and compared to the standard cumulant method without subevents over a wide event multiplicity range. At high multiplicities, the v2 and v3 coefficients exhibit an anticorrelation; this behavior is observed consistently using various methods. The v2 and v4 correlation strength is found to depend on the number of subevents used in the calculation. As the event multiplicity decreases, the results from different subevent methods diverge because of different contributions of noncollective or few-particle correlations. Correlations extracted with the four-subevent method exhibit a tendency to diminish monotonically toward the lowest multiplicity region (about 20 charged tracks) investigated. These findings extend previous studies to a significantly lower event multiplicity range and establish the evidence for the onset of long-range collective multiparticle correlations in small system collisions. |
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Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2021-03-11T04:24:32Z20210556-2813http://hdl.handle.net/10183/218641001122715Event-by-event long-range correlations of azimuthal anisotropy Fourier coefficients (vn) in 8.16 TeV pPb data, collected by the CMS experiment at the CERN Large Hadron Collider, are extracted using a subevent four-particle cumulant technique applied to very low multiplicity events. Each combination of four charged particles is selected from either two, three, or four distinct subevent regions of a pseudorapidity range from −2.4 to 2.4 of the CMS tracker, and with transverse momentum between 0.3 and 3.0 GeV. Using the subevent cumulant technique, correlations between vn of different orders are measured as functions of particle multiplicity and compared to the standard cumulant method without subevents over a wide event multiplicity range. At high multiplicities, the v2 and v3 coefficients exhibit an anticorrelation; this behavior is observed consistently using various methods. The v2 and v4 correlation strength is found to depend on the number of subevents used in the calculation. As the event multiplicity decreases, the results from different subevent methods diverge because of different contributions of noncollective or few-particle correlations. Correlations extracted with the four-subevent method exhibit a tendency to diminish monotonically toward the lowest multiplicity region (about 20 charged tracks) investigated. These findings extend previous studies to a significantly lower event multiplicity range and establish the evidence for the onset of long-range collective multiparticle correlations in small system collisions.application/pdfengPhysical review. C, Nuclear physics. Melville. Vol. 103, no. 1 (Jan. 2021), 014902, 17 p.Colisao de ions pesadosAceleradores de partículasCorrelations of azimuthal anisotropy Fourier harmonics with subevent cumulants 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:UFRGSTEXT001122715.pdf.txt001122715.pdf.txtExtracted Texttext/plain90003http://www.lume.ufrgs.br/bitstream/10183/218641/2/001122715.pdf.txt3b2ec1913868ce9c6be79d8c48593425MD52ORIGINAL001122715.pdfTexto completo (inglês)application/pdf874925http://www.lume.ufrgs.br/bitstream/10183/218641/1/001122715.pdfeac0c10777b4bec41cebaa315b50c6c3MD5110183/2186412023-07-22 03:41:30.713382oai:www.lume.ufrgs.br:10183/218641Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-22T06:41:30Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at √sNN=8.16 TeV |
title |
Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at √sNN=8.16 TeV |
spellingShingle |
Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at √sNN=8.16 TeV Sirunyan, A. M. Colisao de ions pesados Aceleradores de partículas |
title_short |
Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at √sNN=8.16 TeV |
title_full |
Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at √sNN=8.16 TeV |
title_fullStr |
Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at √sNN=8.16 TeV |
title_full_unstemmed |
Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at √sNN=8.16 TeV |
title_sort |
Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants 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 |
Colisao de ions pesados Aceleradores de partículas |
topic |
Colisao de ions pesados Aceleradores de partículas |
description |
Event-by-event long-range correlations of azimuthal anisotropy Fourier coefficients (vn) in 8.16 TeV pPb data, collected by the CMS experiment at the CERN Large Hadron Collider, are extracted using a subevent four-particle cumulant technique applied to very low multiplicity events. Each combination of four charged particles is selected from either two, three, or four distinct subevent regions of a pseudorapidity range from −2.4 to 2.4 of the CMS tracker, and with transverse momentum between 0.3 and 3.0 GeV. Using the subevent cumulant technique, correlations between vn of different orders are measured as functions of particle multiplicity and compared to the standard cumulant method without subevents over a wide event multiplicity range. At high multiplicities, the v2 and v3 coefficients exhibit an anticorrelation; this behavior is observed consistently using various methods. The v2 and v4 correlation strength is found to depend on the number of subevents used in the calculation. As the event multiplicity decreases, the results from different subevent methods diverge because of different contributions of noncollective or few-particle correlations. Correlations extracted with the four-subevent method exhibit a tendency to diminish monotonically toward the lowest multiplicity region (about 20 charged tracks) investigated. These findings extend previous studies to a significantly lower event multiplicity range and establish the evidence for the onset of long-range collective multiparticle correlations in small system collisions. |
publishDate |
2021 |
dc.date.accessioned.fl_str_mv |
2021-03-11T04:24:32Z |
dc.date.issued.fl_str_mv |
2021 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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info:eu-repo/semantics/publishedVersion |
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http://hdl.handle.net/10183/218641 |
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0556-2813 |
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001122715 |
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http://hdl.handle.net/10183/218641 |
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eng |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review. C, Nuclear physics. Melville. Vol. 103, no. 1 (Jan. 2021), 014902, 17 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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