Probing charm quark dynamics via multiparticle correlations in Pb-Pb collisions at √sNN = 5.02 TeV
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Publication Date: | 2022 |
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Format: | Article |
Language: | eng |
Source: | Repositório Institucional da UFRGS |
Download full: | http://hdl.handle.net/10183/249597 |
Summary: | Multiparticle azimuthal correlations of prompt D0 mesons are measured in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of √sNN=5.02 TeV. For the first time, a four-particle cumulant method is used to extract the second Fourier coefficient of the azimuthal distribution (v2) of D0 mesons as a function of event centrality and the D0 transverse momentum. The ratios of the four-particle v2 values to previously measured two-particle cumulant results provide direct experimental access to event-by-event fluctuations of charm quark azimuthal anisotropies. These ratios are also found to be comparable to those of inclusive charged particles in the event. However, hints of deviations are seen in the most central and peripheral collisions. To investigate the origin of flow fluctuations in the charm sector, these measurements are compared to a model implementing fluctuations of charm quark energy loss via collisional or radiative processes in the quark-gluon plasma. These models cannot quantitatively describe the data over the full transverse momentum and centrality ranges, although the calculations with collisional energy loss provide a better description of the data. |
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Tumasyan, ArmenSilveira, Gustavo Gil daCMS Collaboration2022-10-03T04:48:54Z20220031-9007http://hdl.handle.net/10183/249597001147217Multiparticle azimuthal correlations of prompt D0 mesons are measured in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of √sNN=5.02 TeV. For the first time, a four-particle cumulant method is used to extract the second Fourier coefficient of the azimuthal distribution (v2) of D0 mesons as a function of event centrality and the D0 transverse momentum. The ratios of the four-particle v2 values to previously measured two-particle cumulant results provide direct experimental access to event-by-event fluctuations of charm quark azimuthal anisotropies. These ratios are also found to be comparable to those of inclusive charged particles in the event. However, hints of deviations are seen in the most central and peripheral collisions. To investigate the origin of flow fluctuations in the charm sector, these measurements are compared to a model implementing fluctuations of charm quark energy loss via collisional or radiative processes in the quark-gluon plasma. These models cannot quantitatively describe the data over the full transverse momentum and centrality ranges, although the calculations with collisional energy loss provide a better description of the data.application/pdfengPhysical review letters. Melville. Vol. 129, no. 2 (July 2022), 022001, 19 p.Aceleradores de partículasColisao de ions pesadosMesonsProbing charm quark dynamics via multiparticle correlations in Pb-Pb 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:UFRGSTEXT001147217.pdf.txt001147217.pdf.txtExtracted Texttext/plain91551http://www.lume.ufrgs.br/bitstream/10183/249597/2/001147217.pdf.txtff104743c0b4f07c15fbb9a5b72f2e38MD52ORIGINAL001147217.pdfTexto completo (inglês)application/pdf510664http://www.lume.ufrgs.br/bitstream/10183/249597/1/001147217.pdf917dd4470485987df074d71c78ef26e7MD5110183/2495972023-07-22 03:41:07.576953oai:www.lume.ufrgs.br:10183/249597Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-22T06:41:07Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Probing charm quark dynamics via multiparticle correlations in Pb-Pb collisions at √sNN = 5.02 TeV |
title |
Probing charm quark dynamics via multiparticle correlations in Pb-Pb collisions at √sNN = 5.02 TeV |
spellingShingle |
Probing charm quark dynamics via multiparticle correlations in Pb-Pb collisions at √sNN = 5.02 TeV Tumasyan, Armen Aceleradores de partículas Colisao de ions pesados Mesons |
title_short |
Probing charm quark dynamics via multiparticle correlations in Pb-Pb collisions at √sNN = 5.02 TeV |
title_full |
Probing charm quark dynamics via multiparticle correlations in Pb-Pb collisions at √sNN = 5.02 TeV |
title_fullStr |
Probing charm quark dynamics via multiparticle correlations in Pb-Pb collisions at √sNN = 5.02 TeV |
title_full_unstemmed |
Probing charm quark dynamics via multiparticle correlations in Pb-Pb collisions at √sNN = 5.02 TeV |
title_sort |
Probing charm quark dynamics via multiparticle correlations in Pb-Pb 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 Mesons |
topic |
Aceleradores de partículas Colisao de ions pesados Mesons |
description |
Multiparticle azimuthal correlations of prompt D0 mesons are measured in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of √sNN=5.02 TeV. For the first time, a four-particle cumulant method is used to extract the second Fourier coefficient of the azimuthal distribution (v2) of D0 mesons as a function of event centrality and the D0 transverse momentum. The ratios of the four-particle v2 values to previously measured two-particle cumulant results provide direct experimental access to event-by-event fluctuations of charm quark azimuthal anisotropies. These ratios are also found to be comparable to those of inclusive charged particles in the event. However, hints of deviations are seen in the most central and peripheral collisions. To investigate the origin of flow fluctuations in the charm sector, these measurements are compared to a model implementing fluctuations of charm quark energy loss via collisional or radiative processes in the quark-gluon plasma. These models cannot quantitatively describe the data over the full transverse momentum and centrality ranges, although the calculations with collisional energy loss provide a better description of the data. |
publishDate |
2022 |
dc.date.accessioned.fl_str_mv |
2022-10-03T04:48:54Z |
dc.date.issued.fl_str_mv |
2022 |
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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article |
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publishedVersion |
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http://hdl.handle.net/10183/249597 |
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0031-9007 |
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001147217 |
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http://hdl.handle.net/10183/249597 |
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eng |
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dc.relation.ispartof.pt_BR.fl_str_mv |
Physical review letters. Melville. Vol. 129, no. 2 (July 2022), 022001, 19 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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