TY  - INPR
A1  - Bravina, Larissa
A1  - Zabrodin, Eugene E.
A1  - Bleicher, Marcus
A1  - Bass, Steffen A.
A1  - Brandstetter, Mathias
A1  - Fäßler, Amand
A1  - Fuchs, Christian
A1  - Greiner, Walter
A1  - Gorenstein, Mark I.
A1  - Soff, Sven
A1  - Stöcker, Horst
T1  - Transition to resonance-rich matter in heavy ion collisions at RHIC energies
N2  - The equilibration of hot and dense nuclear matter produced in the central region in central Au+Au collisions at square root s = 200A GeV is studied within the microscopic transport model UrQMD. The pressure here becomes isotropic at t approx 5 fm/c. Within the next 15 fm/c the expansion of the matter proceeds almost isentropically with the entropy per baryon ratio S/A approx 150. During this period the equation of state in the (P, epsilon)-plane has a very simple form, P = 0.15 epsilon. Comparison with the statistical model (SM) of an ideal hadron gas reveals that the time of approx 20 fm/c may be too short to attain the fully equilibrated state. Particularly, the fractions of resonances are overpopulated in contrast to the SM values. The creation of such a long-lived resonance-rich state slows down the relaxation to chemical equilibrium and can be detected experimentally.
Y1  - 2000
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/4793
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-7137
SN  - 1361-6471
SN  - 0305-4616
N1  - Später erschienen in: Journal of physics. G, Nuclear and particle physics, 27.2001, Nr. 3, Art. 421, doi:10.1088/0954-3899/27/3/321
SP  - 1
EP  - 5
ER  -