Transverse Hydrodynamics With a First Order Phase Transition in Very High-energy Nuclear Collisions
Jun, 198644 pages
Published in:
- Acta Phys.Polon.B 18 (1987) 551
Contribution to:
Report number:
- JYFL-15/86
Citations per year
Abstract:
The hydrodynamic treatment of the central region of ultrarelativistic nuclear collisions using the bag model equation of state and assuming a smooth phase transition through equilibrium mixed phase, is reviewed together with the calculation of transverse momentum distributions of hadrons, dilepton spectra and the kinetic evolution of strangeness. Transverse collective flow leads to distinct features in the hadron and dilepton spectra. To study the flow, the events must be sampled according to their multiplicity, which essentially fixes the initial conditions for the flow. The transverse momenta of the hadrons show clear correlations with the equation of state. Boost invariant longitudinal expansion leads to fast cooling of plasma and strong reduction of the average transverse momentum of hadrons. It is argued that the highest values of transverse momenta which are reported from the cosmic ray experiment, are not easily understood to be of thermal origin. Dilepton spectra in the mass range of a few GeV may offer a possibility to get experimental information on the initial temperature of the matter. Strangeness abundance is argued to be insensitive on the initial temperature of the plasma, but may offer a way of determining the critical temperature.- ZAKOPANE 1986
- LECTURES
- NUCLEUS NUCLEUS: NUCLEAR REACTION
- NUCLEAR REACTION: CENTRAL REGION
- HYDRODYNAMICS
- MODEL: BAG
- HADRON: TRANSVERSE MOMENTUM
- TRANSVERSE MOMENTUM: DILEPTON
- STRANGE PARTICLE: HADROPRODUCTION
- HADROPRODUCTION: STRANGE PARTICLE
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