Evolution effects on parton energy loss with detailed balance

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.014901· OSTI ID:21389211

Luan, Cheng ^[1]; Enke, Wang ^[1]

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1. Institute of Particle Physics, Huazhong Normal University, Wuhan 430079 (China)

The initial conditions in the chemically nonequilibrated medium and Bjorken expanding medium at Relativistic Heavy Ion Collider (RHIC) are determined. With a set of rate equations describing the chemical equilibration of quarks and gluons based on perturbative QCD, we investigate the consequence for parton evolution at RHIC. With considering parton evolution, it is shown that the Debye screening mass and the inverse mean free-path of gluons reduce with increasing proper time in the QGP medium. The parton evolution affects the parton energy loss with detailed balance, both parton energy loss from stimulated emission in the chemically nonequilibrated expanding medium and in Bjorken expanding medium are linear dependent on the propagating distance rather than square dependent in the static medium. The energy absorption cannot be neglected at intermediate jet energies and small propagating distance of the energetic parton in contrast with that it is important only at intermediate jet energy in the static medium. This will increase the energy and propagating distance dependence of the parton energy loss and will affect the shape of suppression of moderately high P{sub T} hadron spectra.

• OSTI ID: 21389211
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 1; Other Information: DOI: 10.1103/PhysRevC.82.014901; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BROOKHAVEN RHIC
ENERGY ABSORPTION
ENERGY LOSSES
GLUONS
HADRONS
MASS
MEAN FREE PATH
QUANTUM CHROMODYNAMICS
QUARK MATTER
QUARKS
REACTION KINETICS
SPECTRA
STIMULATED EMISSION
ABSORPTION
ACCELERATORS
BOSONS
ELEMENTARY PARTICLES
EMISSION
ENERGY-LEVEL TRANSITIONS
FERMIONS
FIELD THEORIES
HEAVY ION ACCELERATORS
KINETICS
LOSSES
MATTER
QUANTUM FIELD THEORY
SORPTION
STORAGE RINGS