Pion–kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at √sNN=2.76 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/10183/219623 |
Resumo: | In this paper, the first femtoscopic analysis of pion–kaon correlations at the LHC is reported. The analysis was performed on the Pb–Pb collision data at √sNN=2.76 TeV recorded with the ALICE detector. The non-identical particle correlations probe the spatio-temporal separation between sources of different particle species as well as the average source size of the emitting system. The sizes of the pion and kaon sources increase with centrality, and pions are emitted closer to the centre of the system and/or later than kaons. This is naturally expected in a system with strong radial flow and is qualitatively reproduced by hydrodynamic models. ALICE data on pion–kaon emission asymmetry are consistent with (3+1)-dimensional viscous hydrodynamics coupled to a statistical hadronisation model, resonance propagation, and decay code THERMINATOR 2 calculation, with an additional time delay between 1 and 2fm/cfor kaons. The delay can be interpreted as evidence for a significant hadronic rescattering phase in heavy-ion collisions at the LHC. |
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Acharya, ShreyasiGay Ducati, Maria BeatrizPereira, Luis GustavoPezzi, Rafael PerettiALICE Collaboration2021-04-08T04:17:49Z20210370-2693http://hdl.handle.net/10183/219623001123759In this paper, the first femtoscopic analysis of pion–kaon correlations at the LHC is reported. The analysis was performed on the Pb–Pb collision data at √sNN=2.76 TeV recorded with the ALICE detector. The non-identical particle correlations probe the spatio-temporal separation between sources of different particle species as well as the average source size of the emitting system. The sizes of the pion and kaon sources increase with centrality, and pions are emitted closer to the centre of the system and/or later than kaons. This is naturally expected in a system with strong radial flow and is qualitatively reproduced by hydrodynamic models. ALICE data on pion–kaon emission asymmetry are consistent with (3+1)-dimensional viscous hydrodynamics coupled to a statistical hadronisation model, resonance propagation, and decay code THERMINATOR 2 calculation, with an additional time delay between 1 and 2fm/cfor kaons. The delay can be interpreted as evidence for a significant hadronic rescattering phase in heavy-ion collisions at the LHC.application/pdfengPhysics letters. B. Amsterdam. Vol. 813 (Feb. 2021), 136030, 13 p.Aceleradores de partículasColisao de ions pesadosPionsPion–kaon femtoscopy and the lifetime of the hadronic phase 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:UFRGSTEXT001123759.pdf.txt001123759.pdf.txtExtracted Texttext/plain77324http://www.lume.ufrgs.br/bitstream/10183/219623/2/001123759.pdf.txta683b8d3c3ebdb253322ed7f21c46609MD52ORIGINAL001123759.pdfTexto completo (inglês)application/pdf654474http://www.lume.ufrgs.br/bitstream/10183/219623/1/001123759.pdf35b602212d2a946880b3abd4cb575499MD5110183/2196232023-11-12 04:24:43.781527oai:www.lume.ufrgs.br:10183/219623Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-11-12T06:24:43Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Pion–kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at √sNN=2.76 TeV |
title |
Pion–kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at √sNN=2.76 TeV |
spellingShingle |
Pion–kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at √sNN=2.76 TeV Acharya, Shreyasi Aceleradores de partículas Colisao de ions pesados Pions |
title_short |
Pion–kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at √sNN=2.76 TeV |
title_full |
Pion–kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at √sNN=2.76 TeV |
title_fullStr |
Pion–kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at √sNN=2.76 TeV |
title_full_unstemmed |
Pion–kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at √sNN=2.76 TeV |
title_sort |
Pion–kaon femtoscopy and the lifetime of the hadronic phase 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 |
Aceleradores de partículas Colisao de ions pesados Pions |
topic |
Aceleradores de partículas Colisao de ions pesados Pions |
description |
In this paper, the first femtoscopic analysis of pion–kaon correlations at the LHC is reported. The analysis was performed on the Pb–Pb collision data at √sNN=2.76 TeV recorded with the ALICE detector. The non-identical particle correlations probe the spatio-temporal separation between sources of different particle species as well as the average source size of the emitting system. The sizes of the pion and kaon sources increase with centrality, and pions are emitted closer to the centre of the system and/or later than kaons. This is naturally expected in a system with strong radial flow and is qualitatively reproduced by hydrodynamic models. ALICE data on pion–kaon emission asymmetry are consistent with (3+1)-dimensional viscous hydrodynamics coupled to a statistical hadronisation model, resonance propagation, and decay code THERMINATOR 2 calculation, with an additional time delay between 1 and 2fm/cfor kaons. The delay can be interpreted as evidence for a significant hadronic rescattering phase in heavy-ion collisions at the LHC. |
publishDate |
2021 |
dc.date.accessioned.fl_str_mv |
2021-04-08T04:17:49Z |
dc.date.issued.fl_str_mv |
2021 |
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/10183/219623 |
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0370-2693 |
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001123759 |
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url |
http://hdl.handle.net/10183/219623 |
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eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physics letters. B. Amsterdam. Vol. 813 (Feb. 2021), 136030, 13 p. |
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openAccess |
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