2,241 research outputs found
Nuclear matter with off-shell propagation
Symmetric nuclear matter is studied within the conserving, self-consistent
T-matrix approximation. This approach involves off-shell propagation of
nucleons in the ladder diagrams. The binding energy receives contributions from
the background part of the spectral function, away form the quasiparticle peak.
The Fermi energy at the saturation point fulfills the Hugenholz-Van Hove
relation. In comparison to the Brueckner-Hartree-Fock approach, the binding
energy is reduced and the equation of state is harde
Thermodynamic consistency for nuclear matter calculations
We investigate the relation between the binding energy and the Fermi energy
and between different expressions for the pressure in cold nuclear matter. For
a self-consistent calculation based on a derivable matrix
approximation with off-shell propagators the thermodynamic relations are well
satisfied unlike for a matrix or a matrix approach using quasi-particle
propagators in the ladder diagrams
Balance functions from a thermal model
A calculation of the pion balance functions in a thermal model is presented.
The total result consists of resonance and non-resonance parts. A satisfactory
agreement with the data on Au+Au collisions at 130 GeV is found.Comment: talk presented by WF during the 3rd Budapest Winter School on
Heavy-Ions, Dec. 8-11, 2003, Budapest, Hungar
Observation of the Mott Effect in Heavy Ion Collisions
Possibility of observing the Mott momentum in the distribution of the
deuterons produced in the process , in the first stage of
a nuclear reaction is presented. The correlation of a hard photon with a
deuteron allows to select those deuterons produced at the beginning of a
reaction.Comment: 10 pages, 5 Postscript figure
Transport theory with self-consistent confinement related to the lattice data
The space-time development of a quark-gluon plasma is calculated from a
Vlasov equation for the distribution function of quasiparticles with medium
dependent masses. At each space-time point the masses are calculated
selfconsistently from a gap equation, whose form is determined by the
requirement that in thermal equilibrium and for a range of temperatures the
energy density of the quasi-particle system is identical to the one from
lattice calculations . The numerical solutions of the Vlasov equation display
confinement. Relations to effective theories like that by Friedberg Lee and
Nambu Jona-Lasinio are established.Comment: 9 pages, 12 figure
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