Dynamical freeze-out condition in ultrarelativistic heavy ion collisions

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dc.creatorEskola, K. J.
dc.creatorNiemi, H.
dc.creatorRuuskanen, P. V.
dc.date2007-10-24
dc.date.accessioned2026-07-07T11:38:19Z
dc.date.available2026-07-07T11:38:19Z
dc.descriptionWe determine the decoupling surfaces for the hydrodynamic description of heavy ion collisions at RHIC and LHC by comparing the local hydrodynamic expansion rate with the microscopic pion-pion scattering rate. The pion $p_T$ spectra for nuclear collisions at RHIC and LHC are computed by applying the Cooper-Frye procedure on the dynamical-decoupling surfaces, and compared with those obtained from the constant-temperature freeze-out surfaces. Comparison with RHIC data shows that the system indeed decouples when the expansion rate becomes comparable with the pion scattering rate. The dynamical decoupling based on the rates comparison also suggests that the effective decoupling temperature in central heavy ion collisions remains practically unchanged from RHIC to LHC.
dc.description7 pages, 9 figures
dc.identifierhttps://arxiv.org/abs/0710.4476
dc.identifierhttp://arxiv.org/abs/0710.4476
dc.identifierPhys.Rev.C77:044907,2008
dc.identifierdoi:10.1103/PhysRevC.77.044907
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/199519
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleDynamical freeze-out condition in ultrarelativistic heavy ion collisions
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