Münster 2002 – scientific programme
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HK: Physik der Hadronen und Kerne
HK 11: Poster Session: Nuclear and Particle Astrophysics
HK 11.1: Poster
Tuesday, March 12, 2002, 10:30–12:45, Foyer Chemie
Quark matter in heavy-ion collisions and compact stars — •David Blaschke1,2, Gerhard Burau1, Christian Gocke1, Hovik Grigorian1,3, Yuri Kalinovsky1,4, and Gevorg Poghosyan1,3 — 1Fachbereich Physik, Universitaet Rostock — 2Bogoliubov Lab. for Theor. Physics, JINR Dubna — 3Department of Physics, Yerevan State University — 4Lab. for Information Technologies, JINR Dubna
A nonlocal, chiral quark model approach is developed at finite temperature and density for the description of the chiral symmetry restoration and deconfinement phase transition as well as for the occurence of a color superconducting phase with a nonvanishing diquark condensate. The phase diagram as well as in-medium modification of hadronic properties are given. Special emphasis is on the description of the Mott effect for mesons at the deconfinement transition. Signals for this phase transition in heavy-ion collisions and in compact stars are derived. The anomalous J/psi suppression effect as observed by the CERN NA50 experiment is discussed as a Mott effect for D-meson states with consequences for the kinetics of heavy flavors (charmlike enhancement). A clustering of the population of compact stars at the critical line dividing hadronic star from quark core star configurations in the phase diagram (angular velocity vs. baryon number) of accreting compact stars in low-mass X-ray binaries is suggested as a signal for deconfinement in their interior. Consequences of the color superconductivity transition for explosive phenomena and for the cooling evolution of protoneutron stars are demonstrated.