Strangeness and Qgp Freeze-out Dynamics
نویسندگان
چکیده
We compare chemical and thermal analysis of the SPS Pb–Pb results at 158A GeV, and present a first chemical analysis of RHIC results. We show how a combined analysis of several strange hadron resonances can be used in a study of freeze-out dynamics.
منابع مشابه
Hadron Freeze-out and QGP Hadronization
Abundances and m⊥-spectra of strange and other hadronic particles emanating from central 158– 200 A GeV reactions between nuclei are found to originate from a thermally equilibrated, deconfined source in chemical non-equilibrium. Physical freeze-out parameters and physical conditions (pressure, specific energy, entropy, and strangeness) are evaluated. Five properties of the source we obtain are...
متن کاملA New Interpretation of the Qcd Phase Transition and of Strangeness as Qgp Signature
We address the question of how to identify the QCD phase transition using measured light (u,d,s-structured) hadrons, without invoking comparison to the QCD ǫc predictions, and extract ǫc from the data. We analyse several particle and nuclear collisions and extract their chemical freeze-out temperature T at zero baryochemical potential (μB). We find at μB = 0 a universal rise and saturation of b...
متن کاملA (re)interpretation of the Qcd Phase Transition and of Strangeness as Qgp Signature
The temperature at the chemical freeze-out and at zero baryochemical potential has been extracted in a global analysis of ee, p + p, p + p and A + A collisions at √ s=2-1800 GeV per N+N pair. We demonstrate that the temperature at μB=0, rises with the initial energy density ǫi, and saturates above ǫi ∼ 1 GeV/fm. This behaviour is interpreted as mapping out the QCD phase transition universally i...
متن کاملEvidence for QGP in Pb – Pb 158
The hadronic particle production data from relativistic nuclear Pb–Pb 158 A GeV collisions are successfully described within the chemical non-equilibrium model, provided that the analysis does not include Ω and Ω abundances. We show that there is a subtle influence of the Coulomb potential on strange quarks in quark matter which is also seen in our data analysis, and this Coulomb effect confirm...
متن کاملStrangeness and the Discovery of Quark-gluon Plasma
[ I] Search for QGP in RHI Collisions: hadronic observables STRANGENESS s AND ENTROPY S [ II] Resonances: probes of hadronization dynamics p 9 [III] Sudden Hadronization mT Spectra as probe of identity of strange antibaryons and baryons p12 [IV] Strangeness in QGP: thermal yields, phase space aspect ratio, dynamics of relaxation to equilbrium p21 [V] Statistical hadronization: methods, results ...
متن کامل