TY  - INPR
A1  - Dumitru, Adrian Bogdan
A1  - Spieles, Christian
A1  - Stöcker, Horst
A1  - Greiner, Carsten
T1  - Hadron and hadron cluster production in a hydrodynamical model including particle evaporation
N2  - We discuss the evolution of the mixed phase at RHIC and SPS within boostinvariant hydrodynamics. In addition to the hydrodynamical expansion, we also consider evaporation of particles o the surface of the fluid. The back-reaction of this evaporation process on the dynamics of the fluid shortens the lifetime of the mixed phase. In our model this lifetime of the mixed phase is d 12 fm/c in Au + Au at RHIC and d 6.5 fm/c in Pb + Pb at SPS, even in the limit of vanishing transverse expansion velocity. Strong separation of strangeness occurs, especially in events (or at rapidities) with relatively high initial net baryon and strangeness number, enhancing the multiplicity of MEMOs (multiply strange nuclear clusters). If antiquarks and antibaryons reach saturation in the course of the pure QGP or mixed phase, we find that at RHIC the ratio of antideuterons to deuterons may exceed 0.3 and even 4He/4He > 0.1. In S + Au at SPS we find only N/N H 0.1. Due to fluctuations, at RHIC even negative baryon number at midrapidity is possible in individual events, so that the antibaryon and antibaryon-cluster yields exceed those of the corresponding baryons and clusters.
KW  - Kollisionen schwerer Ionen
KW  - SPS
KW  - RHIC
KW  - QGP
KW  - Quark-Gluon-Plasma
KW  - heavy-ion collisions
KW  - SPS
KW  - RHIC
KW  - QGP
KW  - quark-gluon-plasma
Y1  - 2006
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3037
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-23846
ER  -