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Are we close to the QGP? - Hadrochemical vs. microscopic analysis of particle production in ultrarelativistic heavy ion collisions
S. A. Bass, M. Belkacem, M. Brandstetter +9
Ratios of hadronic abundances are analyzed for pp and nucleus-nucleus collisions at sqrt(s)=20 GeV using the microscopic transport model UrQMD. Secondary interactions significantly…
Collective mechanism of dilepton production in high-energy nuclear collisions
I. N. Mishustin, L. M. Satarov, H. Stoecker +1
Collective bremsstrahlung of vector meson fields in relativistic nuclear collisions is studied within the time-dependent Walecka model. Mutual deceleration of the colliding nuclei…
Direct photons in Pb+Pb at CERN-SPS from microscopic transport theory
A. Dumitru, M. Bleicher, S. A. Bass +4
Direct photon production in central Pb+Pb collisions at CERN-SPS energy is calculated within the relativistic microscopic transport model UrQMD, and within distinctly different ver…
Relativistic transport theory of N, Δand N^{*}(1440) interacting through , and mesons
Guangjun Mao, L. Neise, H. Stöcker +1
A self-consistent relativistic integral-differential equation of the Boltzmann-Uehling-Uhlenbeck-type for the (1440) resonance is developed based on an effective Lagrangian…
Hadron and hadron-cluster production in a hydrodynamical model including particle evaporation
A. Dumitru, C. Spieles, H. Stoecker +1
We discuss the evolution of the mixed phase at RHIC and SPS within boostinvariant hydrodynamics. In addition to the hydrodynamical expansion, we also consider evaporation of partic…
A microscopic calculation of secondary Drell-Yan production in heavy ion collisions
C. Spieles, L. Gerland, N. Hammon +6
A study of secondary Drell-Yan production in nuclear collisions is presented for SPS energies. In addition to the lepton pairs produced in the initial collisions of the projectile…
Chiral Lagrangian for strange hadronic matter
P. Papazoglou, S. Schramm, J. Schaffner-Bielich +2
A generalized Lagrangian for the description of hadronic matter based on the linear -model is proposed. Besides the baryon octet, the spin-0 and spin-1…
Probes for the early reaction dynamics of heavy-ion collisions at AGS and SPS
A. Dumitru, J. Brachmann, M. Bleicher +3
We discuss the early evolution of ultrarelativistic heavy-ion collisions within a multi-fluid dynamical model. In particular, we show that due to the finite mean-free path of the p…
Properties of Exotic Matter for Heavy Ion Searches
Juergen Schaffner-Bielich, Carsten Greiner, Horst Stoecker +1
We examine the properties of both forms of strange matter, small lumps of strange quark matter (strangelets) and of strange hadronic matter (Metastable Exotic Multihypernuclear Obj…
Hadron production in relativistic nuclear collisions: thermal hadron source or hadronizing quark-gluon plasma?
C. Spieles, H. Stoecker, C. Greiner
Measured hadron yields from relativistic nuclear collisions can be equally well understood in two physically distinct models, namely a static thermal hadronic source vs.~a time-dep…
Nonequilibrium fluid-dynamics in the early stage of ultrarelativistic heavy-ion collisions
J. Brachmann, A. Dumitru, J. A. Maruhn +3
To describe ultrarelativistic heavy-ion collisions we construct a three-fluid hydrodynamical model. In contrast to one-fluid hydrodynamics, it accounts for the finite stopping powe…