A relativistic effective interaction for heavy-ion collisions

Weber, Klaus; Blättel, Bernhard; Cassing, W.; Dönges, Hans-Christoph; Koch, Volker; Lang, Andreas; Mosel, U.

doi:10.1016/0375-9474(92)90134-6

Cited by 82 publications

(116 citation statements)

References 31 publications

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“…Since the covariant BUU approach has been extensively discussed in the reviews [31,32] and in [33] we only recall the basic equations and the corresponding quasi-particle properties that are relevant for a proper understanding of the results reported in this study. The relativistic BUU (RBUU) equation with momentum-dependent mean-fields or selfenergies is given by (for details see refs.…”

Section: A Baryon Dynamicsmentioning

confidence: 99%

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Analysis of subthreshold antiproton production inp-nucleus and nucleus-nucleus collisions in the relativistic Boltzmann-Uehling-Uhlenbeck approach

et al. 1994

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We calculate the subthreshold production of antiprotons in the Lorentzcovariant RBUU approach employing a weighted testparticle method to treat the antiproton propagation and absorption nonperturbatively. We find that the antiproton differential cross sections are highly sensitive to the baryon and antiproton selfenergies in the dense baryonic environment. Adopting the baryon scalar and vector selfenergies from the empirical optical potential for proton-nucleus elastic scattering and from Dirac-Brueckner calculations at higher density ρ > ρ 0 we examine the differential antiproton spectra as a function of the antiproton selfenergy. A detailed comparison with the available experimental data for p-nucleus and nucleus-nucleus reactions shows that the antiproton feels a moderately attractive mean-field at normal nuclear matter density ρ 0 which is in line with a dispersive potential extracted from the free annihilation cross section. † Supported by BMFT, GSI Darmstadt and KFA Jülich.

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Section: A Baryon Dynamicsmentioning

confidence: 99%

“…The relativistic BUU (RBUU) equation with momentum-dependent mean-fields or selfenergies is given by (for details see refs. [31][32][33])…”

Section: A Baryon Dynamicsmentioning

confidence: 99%

Analysis of subthreshold antiproton production inp-nucleus and nucleus-nucleus collisions in the relativistic Boltzmann-Uehling-Uhlenbeck approach

et al. 1994

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“…The connection of the scalar and vector mean fields to the underlying relativistic twobody theory is explored in [El92,Fu92,We92]. Effective cross sections in the medium are studied in [Li93,Ma94b].…”

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confidence: 99%

“…Effective cross sections in the medium are studied in [Li93,Ma94b]. Additional momentum-dependent scalar and vector potentials, which provide a more accurate description of the optical potential, are introduced in [We92,We93a]. Shock waves are discussed in [Mo95].…”

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confidence: 99%

Recent Progress in Quantum Hadrodynamics

Serot

Walecka

1997

Int. J. Mod. Phys. E

991

1,511

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Quantum hadrodynamics (QHD) is a framework for describing the nuclear many-body problem as a relativistic system of baryons and mesons. Motivation is given for the utility of such an approach and for the importance of basing it on a local, Lorentz-invariant lagrangian density. Calculations of nuclear matter and finite nuclei in both renormalizable and nonrenormalizable, effective QHD models are discussed. Connections are made between the effective and renormalizable models, as well as between relativistic mean-field theory and more sophisticated treatments. Recent work in QHD involving nuclear structure, electroweak interactions in nuclei, relativistic transport theory, nuclear matter under extreme conditions, and the evaluation of loop diagrams is reviewed.

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“…The momentum dependence of the interaction also becomes important in the description of heavy-ion collisions. Several parametrizations for a parametric momentum dependence of the potentials have been developed in different approaches [48,49,50,51,52,53].…”

Section: Introductionmentioning

confidence: 99%

Relativistic mean field model with generalized derivative nucleon-meson couplings

2003

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The quantum hadrodynamics (QHD) model with minimal nucleon-meson couplings is generalized by introducing couplings of mesons to derivatives of the nucleon field in the Lagrangian density. This approach allows an effective description of a state-dependent in-medium interaction in the mean-field approximation. Various parametrizations for the generalized couplings are developed and applied to infinite nuclear matter. In this approach, scalar and vector nucleon selfenergies depend on both density and momentum similarly as in the Dirac-Brueckner theory. The Schrödinger-equivalent optical potential is much less repulsive at high nucleon energies as compared to standard relativistic mean field models and thus agrees better with experimental findings. The derivative couplings in the extended model have significant effects on the properties of symmetric nuclear matter and neutron matter.

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A relativistic effective interaction for heavy-ion collisions

Cited by 82 publications

References 31 publications

Analysis of subthreshold antiproton production inp-nucleus and nucleus-nucleus collisions in the relativistic Boltzmann-Uehling-Uhlenbeck approach

Analysis of subthreshold antiproton production inp-nucleus and nucleus-nucleus collisions in the relativistic Boltzmann-Uehling-Uhlenbeck approach

Recent Progress in Quantum Hadrodynamics

Relativistic mean field model with generalized derivative nucleon-meson couplings

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