Journalartikel

Jahr der Veröffentlichung: 1992

Seiten: 577-596

Zeitschrift: Nuclear Physics A: Nuclear and Hadronic Physics

Bandnummer: 549

Heftnummer: 4

ISSN: 0375-9474

DOI Link: https://doi.org/10.1016/0375-9474(92)90666-8

Verlag: Elsevier

Abstract: 
We investigate dynamical polarizations of the Dirac sea within a one-dimensional model of the Walecka type by comparing collisions within the no-sea approximation with those including the Dirac sea up to a cutoff in momentum of 1.3 GeV/c which is mandatory fora proper convergence of densities in the fully relativistic theory. Apart from a renormalization of coupling constants due to the Dirac-sea polarizations by about 30% we find a surprising amount of stopping at intermediate-energy collisions which is not present in the mean-field theory within the no-sea limit and can be related to a transfer of energy from relative motion to internal excitations of the system. The actual magnitude of this energy transfer, however, is small compared to the stopping by residual nucleon-nucleon collisions and is hardly expected to be observable in experiment.

Harvard-Zitierstil: Jung, C., Cassing, W. and Mosel, U. (1992) Dynamical polarizations of the Dirac sea in collisions of finite nuclear systems, Nuclear Physics A: Nuclear and Hadronic Physics, 549(4), pp. 577-596. https://doi.org/10.1016/0375-9474(92)90666-8

APA-Zitierstil: Jung, C., Cassing, W., & Mosel, U. (1992). Dynamical polarizations of the Dirac sea in collisions of finite nuclear systems. Nuclear Physics A: Nuclear and Hadronic Physics. 549(4), 577-596. https://doi.org/10.1016/0375-9474(92)90666-8