Jet quenching parameter \hat q in the stochastic QCD vacuum with Landau damping
arXiv:0710.1540 · doi:10.1140/epjc/s10052-008-0599-1
Abstract
We argue that the radiative energy loss of a parton traversing the quark-gluon plasma is determined by Landau damping of soft modes in the plasma. Using this idea, we calculate the jet quenching parameter of a gluon. The calculation is done in SU(3) quenched QCD within the stochastic vacuum model. At the LHC-relevant temperatures, the result depends on the gluon condensate, the vacuum correlation length, and the gluon Debye mass. Numerically, when the temperature varies from T=T_c to T=900 MeV, the jet quenching parameter rises from \hat q=0 to approximately 1.8 GeV^2/fm. We compare our results with the predictions of perturbative QCD and other calculations.
arXiv comment20 pages, 6 figures, discussions and references added; final version to appear in Eur. Phys. J. C
References in corpus (29)
- Radiative energy loss of high energy quarks and gluons in a finite volume quark-gluon plasma
- Thermodynamics of SU(3) Lattice Gauge Theory
- Energy loss in perturbative QCD
- Calculating the Jet Quenching Parameter from AdS/CFT
- The Quark-Gluon Plasma: Collective Dynamics and Hard Thermal Loops
- Wilson loops in heavy ion collisions and their calculation in AdS/CFT
- Field correlators in QCD. Theory and applications
- Momentum fluctuations of heavy quarks in the gauge-string duality
- The Spatial String Tension in the Deconfined Phase of the (3+1)-Dimensional SU(2) Gauge Theory
- Small Shear Viscosity of a Quark-Gluon Plasma Implies Strong Jet Quenching
- Gauge--invariant field correlators in QCD at finite temperature
- Gauge-invariant field-strength correlators in pure Yang-Mills and full QCD at finite temperature
- A lattice determination of QCD field strength correlators
- S-Matrix Unitarity, Impact Parameter Profiles, Gluon Saturation and High-Energy Scattering
- Heavy Quark Potentials and Quarkonia Binding
- Confining QCD Strings, Casimir Scaling, and a Euclidean Approach to High-Energy Scattering
- The \bar q q Bound States and Instanton Molecule at T >~ T_c
- Field strength correlators in QCD: new fits to the lattice data
- Three-Dimensional SU(3) gauge theory and the Spatial String Tension of the (3+1)-Dimensional Finite Temperature SU(3) Gauge Theory
- Thermal gluo-magnetic vacuum of SU(N) gauge theory
- String Nature of Confinement in (Non-)Abelian Gauge Theories
- Colour Screening, Quark Propagation in Nuclear Matter and the Broadening of the Momentum Distribution of Drell-Yan Pairs
- Curvature expansion for the background-induced gluodynamics string
- Effects of the Running of the QCD Coupling on the Energy Loss in the Quark-Gluon Plasma
- Nature of the Chiral Restoration Transition in QCD
- A Heavy Quark-Antiquark Pair in Hot QCD
- Vacuum Expectation Value of a Wegner-Wilson Loop near the Light Cone
- Topics in Non-Perturbative QCD
- Following Gluonic World Lines to Find the QCD Coupling in the Infrared