New nonperturbative approach to the Debye mass in hot QCD
Abstract The Debye mass m D is computed nonperturbatively in the deconfined phase of QCD, where chromomagnetic confinement is known to be present. The latter defines m D to be m D = c D σ s , where c D ≅ 2.06 and σ s = σ s ( T ) is the spatial string tension. The resulting magnitude of m D ( T ) and temperature dependence are in good agreement with lattice calculations. Background perturbation theory expansion for m D ( T ) is discussed in comparison to standard perturbative results and recent gauge-invariant definitions.