Qgp versus Hg
نویسندگان
چکیده
We study quark-gluon plasma (QGP) and hadronic gas (HG) models of the central fireball presumed to be the source of abundantly produced strange (anti-)baryons in S → W collisions at 200 GeV A. We consider how multi-strange (anti-)baryon multiplicities depend on strangeness conservation and compare the HG and QGP fireball scenarios. We argue that the total particle multiplicity emerging from the central rapidity region as well as the variation of production rates with changes in the beam energy allows to distinguish between the two reaction scenarios. Published in: Proceedings of the XXVI International Conference on High Energy Physics Dallas, TX, August 1992 American Institute of Physics, New York, J.R. Sanford, ed., pp. 983–990. AZPH–TH/92–27 PAR/LPTHE/92–35 September 1992 In part supported by US-DOE grant DE-FG02-92ER40733 Department of Physics, University of Arizona, Tucson, AZ 85721 Unité associée au CNRS UA 280, Université PARIS 7, Tour 24, 5è ét., 2 Place Jussieu, F-75251 CEDEX 05. 2 J. Rafelski, J. Letessier and A. Tounsi
منابع مشابه
Ω, J/ψ and ψ′ Production in Nuclear Collisions and Quark Gluon Plasma Hadronization
The transverse mass spectra of Ω, J/ψ and ψ in Pb+Pb collisions at 158 A·GeV are studied within a hydrodynamical model of the quark gluon plasma expansion and hadronization. The model reproduces the existing data with the common hadronization parameters: temperature T = Tc ∼= 170 MeV and average collective transverse velocity vT ∼= 0.2. The possibility of observing the quark gluon plasma (QGP) ...
متن کامل2 Ω , J / ψ and ψ ′ Production in Nuclear Collisions and Quark Gluon Plasma Hadronization
The transverse mass spectra of Ω, J/ψ and ψ in Pb+Pb collisions at 158 A·GeV are studied within a hydrodynamical model of the quark gluon plasma expansion and hadronization. The model reproduces the existing data with the common hadronization parameters: temperature T = TH ∼= 170 MeV and average collective transverse velocity vT ∼= 0.2. The possibility of observing the quark gluon plasma (QGP) ...
متن کاملCOMMENT ON CHERNAVSKAYA’S PAPER “DOUBLE PHASE TRANSITION MODEL AND THE PROBLEM OF ENTROPY AND BARYON NUMBER CONSERVATION” hep-ph/9701265
In the standard construction of a first-order equilibrium phase transition via the Gibbs criteria from a quark-gluon plasma (QGP) to a hot and dense hadron gas (HG), the appearance of a discontinuity in the entropy per baryon ratio (s/n) makes the phase transition at fixed temperature T and fixed chemical potential μ irreversible. Recently several papers have been addressed to the question of c...
متن کاملar X iv : h ep - p h / 97 11 34 4 v 2 2 1 N ov 1 99 7 STRANGE PARTICLE FREEZE - OUT
We reconsider thermal conditions of the central fireball presumed to be the source of abundantly produced strange (anti-)baryons in S → W collisions at 200 GeV A. We show that it is possible to completely fix the freeze-out temperature of strange particles in terms of the central rapidity kaon to Lambda particle abundance ratio at fixed, high transverse mass using a non-equilibrium hadronizatio...
متن کاملar X iv : h ep - p h / 97 11 34 4 v 1 1 7 N ov 1 99 7 STRANGE PARTICLE FREEZE - OUT
We reconsider thermal conditions of the central fireball presumed to be the source of abundantly produced strange (anti-)baryons in S → W collisions at 200 GeV A. We show that it is possible to completely fix the freeze-out temperature of strange particles in terms of the central rapidity kaon to Lambda particle abundance ratio at fixed, high transverse mass using a non-equilibrium hadronizatio...
متن کامل