Early anisotropic hydrodynamics and thermalization and Hanbury-Brown-Twiss puzzles in the BNL Relativistic Heavy Ion Collider (RHIC)

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.024903· OSTI ID:21419447

Ryblewski, Radoslaw ^[1]; Florkowski, Wojciech ^[1]

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1. H. Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342 Krakow (Poland)

We address the problem of whether the early thermalization and Hanbury-Brown-Twiss (HBT) puzzles in relativistic heavy-ion collisions may be solved by the assumption that the early dynamics of the produced matter is locally anisotropic. The hybrid model describing the purely transverse hydrodynamic evolution followed by the perfect-fluid hydrodynamic stage is constructed. The transition from the transverse to perfect-fluid hydrodynamics is described by the Landau matching conditions applied at a fixed proper time {tau}{sub tr}. The global fit to the RHIC data reproduces the soft hadronic observables (the pion, kaon, and the proton spectra, the pion and kaon elliptic flow, and the pion HBT radii) with the accuracy of about 20%. These results indicate that the assumption of the very fast thermalization may be relaxed. In addition, the presented model suggests that a large part of the inconsistencies between the theoretical and experimental HBT results may be removed.

• OSTI ID: 21419447
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevC.82.024903; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ANISOTROPY
BNL
BROOKHAVEN RHIC
EVOLUTION
HEAVY ION REACTIONS
HYDRODYNAMICS
IDEAL FLOW
KAONS
PIONS
PROTON SPECTRA
RELATIVISTIC RANGE
SIMULATION
THERMALIZATION
ACCELERATORS
BOSONS
ELEMENTARY PARTICLES
ENERGY RANGE
FLUID FLOW
FLUID MECHANICS
HADRONS
HEAVY ION ACCELERATORS
INCOMPRESSIBLE FLOW
MECHANICS
MESONS
NATIONAL ORGANIZATIONS
NUCLEAR REACTIONS
PSEUDOSCALAR MESONS
SLOWING-DOWN
SPECTRA
STEADY FLOW
STORAGE RINGS
STRANGE MESONS
STRANGE PARTICLES
US AEC
US DOE
US ERDA
US ORGANIZATIONS