Kaon femtoscopy in Pb-Pb collisions at √sNN = 2.76 TeV

Detalhes bibliográficos
Autor(a) principal: Acharya, Shreyasi
Data de Publicação: 2017
Outros Autores: Gay Ducati, Maria Beatriz, Pereira, Luis Gustavo, Pezzi, Rafael Peretti, ALICE Collaboration
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/177584
Resumo: We present the results of three-dimensional femtoscopic analyses for charged and neutral kaons recorded by ALICE in Pb-Pb collisions at √ sNN = 2.76 TeV. Femtoscopy is used to measure the space-time characteristics of particle production from the effects of quantum statistics and final-state interactions in two-particle correlations. Kaon femtoscopy is an important supplement to that of pions because it allows one to distinguish between different model scenarios working equally well for pions. In particular, we compare the measured three-dimensional kaon radii with a purely hydrodynamical calculation and a model where the hydrodynamic phase is followed by a hadronic rescattering stage. The former predicts an approximate transverse mass (mT) scaling of source radii obtained from pion and kaon correlations. This mT scaling appears to be broken in our data, which indicates the importance of the hadronic rescattering phase at LHC energies. A kT scaling of pion and kaon source radii is observed instead. The time of maximal emission of the system is estimated by using the three-dimensional femtoscopic analysis for kaons. The measured emission time is larger than that of pions. Our observation is well supported by the hydrokinetic model predictions.
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spelling Acharya, ShreyasiGay Ducati, Maria BeatrizPereira, Luis GustavoPezzi, Rafael PerettiALICE Collaboration2018-05-05T03:16:29Z20170556-2813http://hdl.handle.net/10183/177584001060511We present the results of three-dimensional femtoscopic analyses for charged and neutral kaons recorded by ALICE in Pb-Pb collisions at √ sNN = 2.76 TeV. Femtoscopy is used to measure the space-time characteristics of particle production from the effects of quantum statistics and final-state interactions in two-particle correlations. Kaon femtoscopy is an important supplement to that of pions because it allows one to distinguish between different model scenarios working equally well for pions. In particular, we compare the measured three-dimensional kaon radii with a purely hydrodynamical calculation and a model where the hydrodynamic phase is followed by a hadronic rescattering stage. The former predicts an approximate transverse mass (mT) scaling of source radii obtained from pion and kaon correlations. This mT scaling appears to be broken in our data, which indicates the importance of the hadronic rescattering phase at LHC energies. A kT scaling of pion and kaon source radii is observed instead. The time of maximal emission of the system is estimated by using the three-dimensional femtoscopic analysis for kaons. The measured emission time is larger than that of pions. Our observation is well supported by the hydrokinetic model predictions.application/pdfengPhysical review. C, Nuclear physics. Melville. Vol. 96, no. 6 (Dec. 2017), 064613, 16 p.Colisao de ions pesadosAceleradores de partículasProducao de mesonsKaon femtoscopy in Pb-Pb collisions at √sNN = 2.76 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:UFRGSORIGINAL001060511.pdf001060511.pdfTexto completo (inglês)application/pdf783169http://www.lume.ufrgs.br/bitstream/10183/177584/1/001060511.pdf808811badb86e21f213482708c958f17MD51TEXT001060511.pdf.txt001060511.pdf.txtExtracted Texttext/plain86884http://www.lume.ufrgs.br/bitstream/10183/177584/2/001060511.pdf.txt8fc086417cb46721e429314180e373ffMD5210183/1775842023-11-30 04:24:54.906619oai:www.lume.ufrgs.br:10183/177584Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-11-30T06:24:54Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Kaon femtoscopy in Pb-Pb collisions at √sNN = 2.76 TeV
title Kaon femtoscopy in Pb-Pb collisions at √sNN = 2.76 TeV
spellingShingle Kaon femtoscopy in Pb-Pb collisions at √sNN = 2.76 TeV
Acharya, Shreyasi
Colisao de ions pesados
Aceleradores de partículas
Producao de mesons
title_short Kaon femtoscopy in Pb-Pb collisions at √sNN = 2.76 TeV
title_full Kaon femtoscopy in Pb-Pb collisions at √sNN = 2.76 TeV
title_fullStr Kaon femtoscopy in Pb-Pb collisions at √sNN = 2.76 TeV
title_full_unstemmed Kaon femtoscopy in Pb-Pb collisions at √sNN = 2.76 TeV
title_sort Kaon femtoscopy in Pb-Pb collisions at √sNN = 2.76 TeV
author Acharya, Shreyasi
author_facet Acharya, Shreyasi
Gay Ducati, Maria Beatriz
Pereira, Luis Gustavo
Pezzi, Rafael Peretti
ALICE Collaboration
author_role author
author2 Gay Ducati, Maria Beatriz
Pereira, Luis Gustavo
Pezzi, Rafael Peretti
ALICE Collaboration
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Acharya, Shreyasi
Gay Ducati, Maria Beatriz
Pereira, Luis Gustavo
Pezzi, Rafael Peretti
ALICE Collaboration
dc.subject.por.fl_str_mv Colisao de ions pesados
Aceleradores de partículas
Producao de mesons
topic Colisao de ions pesados
Aceleradores de partículas
Producao de mesons
description We present the results of three-dimensional femtoscopic analyses for charged and neutral kaons recorded by ALICE in Pb-Pb collisions at √ sNN = 2.76 TeV. Femtoscopy is used to measure the space-time characteristics of particle production from the effects of quantum statistics and final-state interactions in two-particle correlations. Kaon femtoscopy is an important supplement to that of pions because it allows one to distinguish between different model scenarios working equally well for pions. In particular, we compare the measured three-dimensional kaon radii with a purely hydrodynamical calculation and a model where the hydrodynamic phase is followed by a hadronic rescattering stage. The former predicts an approximate transverse mass (mT) scaling of source radii obtained from pion and kaon correlations. This mT scaling appears to be broken in our data, which indicates the importance of the hadronic rescattering phase at LHC energies. A kT scaling of pion and kaon source radii is observed instead. The time of maximal emission of the system is estimated by using the three-dimensional femtoscopic analysis for kaons. The measured emission time is larger than that of pions. Our observation is well supported by the hydrokinetic model predictions.
publishDate 2017
dc.date.issued.fl_str_mv 2017
dc.date.accessioned.fl_str_mv 2018-05-05T03:16:29Z
dc.type.driver.fl_str_mv Estrangeiro
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dc.identifier.issn.pt_BR.fl_str_mv 0556-2813
dc.identifier.nrb.pt_BR.fl_str_mv 001060511
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dc.relation.ispartof.pt_BR.fl_str_mv Physical review. C, Nuclear physics. Melville. Vol. 96, no. 6 (Dec. 2017), 064613, 16 p.
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