Azimuthal anisotropy and formation of an extreme state of strongly interacting matter at the relativistic heavy-ion collider (RHIC)

Journal Article · Thu Jan 15 00:00:00 EST 2009 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778809010177· OSTI ID:21406039

Okorokov, V. A., E-mail: VAOkorokov@mephi.r ^[1]

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1. Moscow Engineering Physics (State University) (Russian Federation)

Experimental results obtained by studying the azimuthal anisotropy of final states in nucleus-nucleus interactions at the energies of the relativistic heavy-ion collider (RHIC) are systematized. The medium is found to exhibit a pronounced collective behavior, which is likely to be formed at an early, parton, stage of the spacetime evolution of product hot and dense matter. Experimental data on the azimuthal anisotropy indicate that strongly interacting matter produced in the final state under extreme conditions behaves as a nearly ideal liquid rather than an ideal gas of quarks and gluons. The experimentally observed suppression of high-transverse-momentum jets and substantial modification of jetlike azimuthal correlations in heavy-ion collisions suggest that the energy loss of partons propagating in high-temperature matter featuring a high density of color charges is extremely large. The dependence of the amount of hardjet suppression in nucleus-nucleus collisions on the orientation of a jet with respect to the reaction plane was first discovered experimentally at RHIC. A strong suppression of the production of high-transverse-momentum particles and jets at RHIC is a unique phenomenon, which was discovered experimentally at lower energies.

• OSTI ID: 21406039
• Journal Information: Physics of Atomic Nuclei, Vol. 72, Issue 1; Other Information: DOI: 10.1134/S1063778809010177; Copyright (c) 2009 Pleiades Publishing, Ltd.; ISSN 1063-7788
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
ANISOTROPY
BEAM PRODUCTION
BROOKHAVEN RHIC
COLOR MODEL
DENSITY
ENERGY LOSSES
EXPERIMENTAL DATA
GLUONS
HEAVY ION REACTIONS
NUCLEON-NUCLEON INTERACTIONS
QUARKS
SPACE-TIME
TEMPERATURE RANGE 0400-1000 K
TRANSVERSE MOMENTUM
ACCELERATORS
BARYON-BARYON INTERACTIONS
BOSONS
COMPOSITE MODELS
CORRELATIONS
DATA
FERMIONS
HADRON-HADRON INTERACTIONS
HEAVY ION ACCELERATORS
INFORMATION
INTERACTIONS
LINEAR MOMENTUM
LOSSES
MATHEMATICAL MODELS
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE INTERACTIONS
PARTICLE MODELS
PHYSICAL PROPERTIES
QUARK MODEL
STORAGE RINGS
TEMPERATURE RANGE