Centrality dependence of pion freeze-out radii in Pb-Pb collisions at √sNN=2.76 TeV
We report on the measurement of freeze-out radii for pairs of identical-charge pions measured in Pb-Pb collisions at √sNN=2.76 TeV as a function of collision centrality and the average transverse momentum of the pair kT. Three-dimensional sizes of the system (femtoscopic radii), as well as direction...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
4 February 2016
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| In: |
Physical review
Year: 2016, Jahrgang: 93, Heft: 2 |
| ISSN: | 2469-9993 |
| DOI: | 10.1103/PhysRevC.93.024905 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevC.93.024905 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.93.024905 
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| Verfasserangaben: | J. Adam et al.* (ALICE Collaboration) |
MARC
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| 245 | 1 | 0 | |a Centrality dependence of pion freeze-out radii in Pb-Pb collisions at √sNN=2.76 TeV |c J. Adam et al.* (ALICE Collaboration) |
| 246 | 3 | 0 | |a sqrt |
| 246 | 3 | 3 | |a Centrality dependence of pion freeze-out radii in Pb-Pb collisions at root sNN = 2.76 TeV |
| 264 | 1 | |c 4 February 2016 | |
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| 500 | |a Im Titel stehen der Ausdruck "sNN" unter dem Wurzelsymbol | ||
| 500 | |a ALICE collaboration: J. Adam, V. Anguelov, F. Bock, O. Busch, A. Deisting, M.G. Fleck, P. Glässel, L. Karayan, M.L. Knichel, L. Leardini, J. Mercado Pérez, H. Oeschler, K. Oyama, Y. Pachmayer, F. Reidt, K. Reygers, R. Schicker, J. Stachel, J.H. Stiller, M.A. Völkl, Y. Wang, J. Wilkinson, B. Windelband, M. Winn, A. Zimmermann [und 964 weitere] | ||
| 500 | |a Gesehen am 28.07.2020 | ||
| 520 | |a We report on the measurement of freeze-out radii for pairs of identical-charge pions measured in Pb-Pb collisions at √sNN=2.76 TeV as a function of collision centrality and the average transverse momentum of the pair kT. Three-dimensional sizes of the system (femtoscopic radii), as well as direction-averaged one-dimensional radii are extracted. The radii decrease with kT, following a power-law behavior. This is qualitatively consistent with expectations from a collectively expanding system, produced in hydrodynamic calculations. The radii also scale linearly with ⟨dNch/dη⟩1/3. This behavior is compared to world data on femtoscopic radii in heavy-ion collisions. While the dependence is qualitatively similar to results at smaller √sNN, a decrease in the ratio Rout/Rside is seen, which is in qualitative agreement with a specific prediction from hydrodynamic models: a change from inside-out to outside-in freeze-out configuration. The results provide further evidence for the production of a collective, strongly coupled system in heavy-ion collisions at the CERN Large Hadron Collider. | ||
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