Individual Tsallis fits to ALICE Pb-Pb 2.76 TeV pion, kaon, and proton spectra give effective temperatures and freezeout volumes that rise toward central collisions while the nonextensivity parameter q falls, a pattern the authors read as evidence for multiple kinetic freezeout.
Observables and initial conditions for self-similar ellipsoidal flows
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abstract
Single-particle spectra and two-particle Bose-Einstein correlation functions are determined analytically utilizing a self-similar solution of non-relativistic hydrodynamics for ellipsoidally-symmetric, expanding fireballs, by assuming that the symmetry axes of the ellipsoids are tilted in the frame of the observation. The directed, elliptic and third flows are calculated analytically. The mass dependences of the slope parameters in the principal directions of the expansion, together with the mass and angular dependences of the HBT radius parameters, reflect directly the ellipsoidal properties of the flow.
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Thermodynamic Analysis of Transverse Momentum Spectra in Pb-Pb Collisions at 2.76 TeV: Centrality Dependence of Temperature, Freezeout Parameters and Non-Extensitivity
Individual Tsallis fits to ALICE Pb-Pb 2.76 TeV pion, kaon, and proton spectra give effective temperatures and freezeout volumes that rise toward central collisions while the nonextensivity parameter q falls, a pattern the authors read as evidence for multiple kinetic freezeout.