New nonperturbative approach to the Debye mass in hot QCD

Details New nonperturbative approach to the Debye mass in hot QCD New nonperturbative approach to the Debye mass in hot QCD

2006-04-02

arxiv.org/abs/hep-ph/0604004v3

Phys.Lett. B639 (2006) 82-87

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 4 figures; new figures and discussion added; to appear in Phys.Lett.B

Scientific paper

10.1016/j.physletb.2006.06.019

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\sqrt{\sigma_s}, where c_D \cong 2.06 and \sigma_s=\sigma_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.

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