Medium-modified jets and initial state fluctuations as sources of charge correlations measured at energies available at the BNL Relativistic Heavy Ion Collider (RHIC)

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.014916· OSTI ID:21499367

Petersen, Hannah; Bass, Steffen A ^[1]; Renk, Thorsten ^[2]

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1. Department of Physics, Duke University, Durham, North Carolina 27708-0305 (United States)
2. Department of Physics, P. O. Box 35, University of Jyvaeskylae, FI-40014 (Finland)

We investigate the contribution of medium-modified jets and initial state fluctuations to the asymmetry in charged-particle production with respect to the reaction plane. This asymmetry has been suggested as a compelling signature for the chiral magnetic effect in QCD and makes the study of conventional scenarios for the creation of such charged-particle multiplicity fluctuations a timely endeavor. The different path-length combinations of jets through the medium in noncentral heavy ion collisions result in finite correlations of like and different charged particles emitted in the different hemispheres. Our calculation is based on the combination of jet events from Yet another Jet Energy-Loss Model (YaJEM) and a bulk-medium evolution. It is found that the jet production probabilities are too small to observe this effect. The influence of initial state fluctuations on this observable is explored by using an event-by-event (3+1)-dimensional hybrid approach that is based on Ultra-relativistic Quantum Molecular Dynamics (UrQMD) with an ideal hydrodynamic evolution. In this calculation, momentum conservation and elliptic flow are explicitly taken into account. The asymmetries in the initial state are translated to a final state momentum asymmetry by the hydrodynamic flow profile. Dependent on the size of the initial state fluctuations, the resulting charged-particle asymmetries are in qualitative agreement with the preliminary STAR (solenoid tracker at the Relativistic Heavy Ion Collider) results. The multiparticle correlation as proposed by the PHENIX Collaboration can, in principle, be used to disentangle the different contributions, however, in practice, is affected substantially by the procedure to subtract trivial resonance decay contributions.

• OSTI ID: 21499367
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 1; Other Information: DOI: 10.1103/PhysRevC.83.014916; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BNL
BROOKHAVEN RHIC
CHARGED PARTICLES
CHIRALITY
CORRELATIONS
ENERGY LOSSES
EVOLUTION
FLUCTUATIONS
FOUR-DIMENSIONAL CALCULATIONS
HEAVY ION REACTIONS
HYDRODYNAMIC MODEL
MOLECULAR DYNAMICS METHOD
MULTIPLICITY
PARTICLE DECAY
PROBABILITY
QUANTUM CHROMODYNAMICS
RELATIVISTIC RANGE
RESONANCE
SOLENOIDS
ACCELERATORS
CALCULATION METHODS
DECAY
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ENERGY RANGE
EQUIPMENT
FIELD THEORIES
HEAVY ION ACCELERATORS
LOSSES
MATHEMATICAL MODELS
NATIONAL ORGANIZATIONS
NUCLEAR REACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
QUANTUM FIELD THEORY
STATISTICAL MODELS
STORAGE RINGS
THERMODYNAMIC MODEL
US AEC
US DOE
US ERDA
US ORGANIZATIONS
VARIATIONS