TY  - INPR
A1  - Zakout, Ismail A. I.
A1  - Jaqaman, Henry R.
A1  - Pal, Subrata
A1  - Stöcker, Horst
A1  - Greiner, Walter
T1  - Hot hypernuclear matter in the modified quark meson coupling model
N2  - Hot hypernuclear matter is investigated in an explicit SU(3) quark model based on a mean field description of nonoverlapping baryon bags bound by the self-consistent exchange of scalar sigma, zeta and vector omega,phi mesons. The sigma, omega mean fields are assumed to couple to the u, d-quarks while the zeta ,phi mean fields are coupled to the s-quark. The coupling constants of the mean fields with the quarks are assumed to satisfy SU(6) symmetry. The calculations take into account the medium dependence of the bag parameter on the scalar fields sigma, zeta. We consider only the octet baryons N,Lambda,Sigma, Xi in hypernuclear matter. An ideal gas of the strange mesons K and K is introduced to keep zero net strangeness density. Our results for symmetric hypernuclear matter show that a phase transition takes place at a critical temperature around 180 MeV in which the scalar mean fields sigma, zeta take nonzero values at zero baryon density. Furthermore, the bag contants of the baryons decrease significantly at and above this critical temperature indicating the onset of quark deconfinement. The present results imply that the onset of quark deconfinement in SU(3) hypernuclear matter is much stronger than in SU(2) nuclear matter. PACS:21.65.+f, 24.85.+p, 12.39Ba
KW  - heiße Kernmaterie
KW  - Quark
KW  - Meson
KW  - hot hypernuclear matter
KW  - quark
KW  - meson
Y1  - 1999
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3128
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-22766
UR  - http://www.arxiv.org/abs/nucl-th/9904084
ER  -