Isospin effects on sub-threshold kaon production at intermediate energies

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dc.creatorFerini, G.
dc.creatorGaitanos, T.
dc.creatorColonna, M.
dc.creatorDi Toro, M.
dc.creatorWolter, H. H.
dc.date2006-07-05
dc.date.accessioned2026-07-07T11:07:31Z
dc.date.available2026-07-07T11:07:31Z
dc.descriptionWe show that in collisions with neutron rich heavy ions at energies around the production threshold K^0 and K^+ yields might probe the isospin dependent part of the nuclearEquation of State (EoS) at high baryon densities. In particular we suggest the K^0/K^+ ratio as a promising observable. Results obtained in a fully covariant relativistic transport approach are presented for central Au+Au collisions in the beam energy range 0.8-1.8~AGeV. The focus is put on the EoS influence which goes beyond the "collision-cascade" picture. The isovector part of the in-medium interaction affects the kaon multiplicities via two mechanisms: i) a "symmetry potential" effect, i.e. a larger neutron repulsion in n-rich systems (isospin fractionation); ii) a "threshold" effect, due to the change in the self-energies of the particles involved in inelastic processes. Genuine relativistic contributions are revealed, that could allow to directly ``measure'' the Lorentz structure of the effective isovector interaction.
dc.description5 pages, 2 figures, revtex4
dc.identifierhttps://arxiv.org/abs/nucl-th/0607005
dc.identifierhttp://arxiv.org/abs/nucl-th/0607005
dc.identifierPhys.Rev.Lett.97:202301,2006
dc.identifierdoi:10.1103/PhysRevLett.97.202301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189868
dc.subjectNuclear Theory
dc.titleIsospin effects on sub-threshold kaon production at intermediate energies
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