Sudden freeze-out vs continuous emission: duality in hydro-kinetic approach to A+A collisions

Abstract

The problem of spectra formation in hydrodynamic approach to A+A collisions is discussed. It is analyzed in terms of the two different objects: distribution and emission functions. We show that though the process of particle liberation, described by the emission function, is, usually, continuous in time, the observable spectra can be also expressed by means of the Landau/Cooper-Frye prescription. We argue that such an approximate duality results from some symmetry properties that systems in A+A collisions reach to the end of hydrodynamic evolution and reduction of the collision rate at post hydrodynamic stage

arXiv comment6 pages, talk presented by S.V. Akkelin during the 3rd Budapest Winter School on Heavy Ion Physics, Dec. 8-11, 2003, Budapest, Hungary

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Cited by in corpus (6)

• Hydrodynamic Approaches in Relativistic Heavy Ion Reactions
• Hydro-kinetic approach to relativistic heavy ion collisions
• Covariant description of kinetic freeze out through a finite space-like layer
• Hydrodynamic source with continuous emission in Au+Au collisions at $\sqrt{s}=200$ GeV
• Baryon productions and collective flow of relativistic heavy-ion collisions in the AGS, SPS, RHIC and LHC energy regions($\sqrt{s_{NN}}\le 5$GeV to 5.5 TeV)
• Evolution of Observables in a Numerical Kinetic Model