dorsal/arxiv
View SchemaStudy of High Energy Heavy-Ion Collisions in a Relativistic BUU-Approach with Momentum-Dependent Mean-Fields
| Authors | Tomoyuki Maruyama, Wolfgang Cassing, Ulrich Mosel, Stefan Teis, Klaus Weber |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9307024 |
| URL | https://arxiv.org/abs/nucl-th/9307024 |
| DOI | 10.1016/0375-9474(94)90235-6 |
| Journal | Nucl.Phys. A573 (1994) 653-675 |
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.
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"abstract": "We introduce momentum-dependent scalar and vector fields into the Lorentz\ncovariant relativistic BUU- (RBUU-) approach employing a polynomial ansatz for\nthe relativistic nucleon-nucleon interaction. The momentum-dependent\nparametrizations are shown to be valid up to about 1 GeV/u for the empirical\nproton-nucleus optical potential. We perform numerical simulations for\nheavy-ion collisions within the RBUU-approach adopting momentum-dependent and\nmomentum-independent mean-fields and calculate the transverse flow in and\nperpendicular to the reaction plane, the directivity distribution as well as\nsubthreshold K+-production. By means of these observables we discuss the\nparticular role of the momentum-dependent forces and their implications on the\nnuclear equation of state. We find that only a momentum-dependent parameter-set\ncan explain the experimental data on the transverse flow in the reaction plane\nfrom 150 - 1000 MeV/u and the differential K+-production cross sections at 1\nGeV/u at the same time.",
"arxiv_id": "nucl-th/9307024",
"authors": [
"Tomoyuki Maruyama",
"Wolfgang Cassing",
"Ulrich Mosel",
"Stefan Teis",
"Klaus Weber"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/0375-9474(94)90235-6",
"journal_ref": "Nucl.Phys. A573 (1994) 653-675",
"title": "Study of High Energy Heavy-Ion Collisions in a Relativistic BUU-Approach with Momentum-Dependent Mean-Fields",
"url": "https://arxiv.org/abs/nucl-th/9307024"
},
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