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dc.contributor.authorKarasu Uysal, Ayben
dc.contributor.authorALICE, Collaboration
dc.date.accessioned2019-07-08T06:57:30Z
dc.date.available2019-07-08T06:57:30Z
dc.date.issued2016
dc.identifier.urihttps://hdl.handle.net/20.500.12498/559
dc.description.abstractWe 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.en_US
dc.relation10.1103/PhysRevC.93.024905en_US
dc.subjectfreeze-out radii, ALICE, LHCen_US
dc.titleCentrality dependence of pion freeze-out radii in Pb-Pb collisions at √sNN = 2.76 TeVen_US
dc.typeArticleen_US
eperson.orcidid0000-0001-6297-2532en_US


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