Pion-kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at √sNN=2.76 TeV
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 dif...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
2021
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| In: |
Physics letters
Year: 2021, Volume: 813, Pages: 1-13 |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/j.physletb.2020.136030 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2020.136030 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0370269320308339 
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| Author Notes: | ALICE Collaboration |
MARC
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| 246 | 3 | 3 | |a Pion-kaon femtoscopy and the lifetime of the hadronic phase in Pb−Pb collisions at square root s NN = 2.76 TeV |
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| 500 | |a Available online 17 December 2020 | ||
| 500 | |a Gesehen am 16.03.2021 | ||
| 500 | |a ALICE Collaboration: S. Acharya, V. Anguelov, M. Arslandok, M.C. Danisch,V.J.G. Feuillard, P. Glässel, J. Kim, M. Kim, M.K. Köhler, L. Leardini, J.A. Lopez, N.A. Martin, Y. Pachmayer, K. Reygers, R. Schicker, A. Schmah, M.O. Schmidt, J. Stachel, S.F. Stiefelmaier, B. Windelband, A. Yuncu, und weitere 1008 | ||
| 520 | |a 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 2 fm/c for 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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| SRT | |a ALICEACHARPIONKAONFE2021 | ||