Study of a high-energy heavy ion collisions in a relativistic BUU approach with momentum dependent mean fields
Sep 10, 1993
39 pages
Published in:
- Nucl.Phys.A 573 (1994) 653-675
e-Print:
- nucl-th/9307024 [nucl-th]
Report number:
- UGI-93-06
Citations per year
Abstract:
We introduce momentum-dependent scalar and vector fields into the Lorentz covariant relativistic BUU- (RBUU-) approach employing a polynomial ansatz for the relativistic nucleon-nucleon interaction. The momentum-dependent parametrizations are shown to be valid up to about 1 GeV/u for the empirical proton-nucleus optical potential. We perform numerical simulations for heavy-ion collisions within the RBUU-approach adopting momentum-dependent and momentum-independent mean-fields and calculate the transverse flow in and perpendicular to the reaction plane, the directivity distribution as well as subthreshold K+-production. By means of these observables we discuss the particular role of the momentum-dependent forces and their implications on the nuclear equation of state. We find that only a momentum-dependent parameter-set can explain the experimental data on the transverse flow in the reaction plane from 150 - 1000 MeV/u and the differential K+-production cross sections at 1 GeV/u at the same time.Note:
- 27 pages, figures can be obtained from the authors, UGI-93-06
- scattering: heavy ion
- heavy ion: scattering
- nucleon nucleon: interaction
- interaction: nucleon nucleon
- potential: optical
- mean field approximation: momentum dependence
- relativistic
- parametrization
- nuclear reaction: particle flow
- particle flow: transverse
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