Finite temperature gluon propagator in Landau gauge: non-zero Matsubara frequencies and spectral densities
CFisUC, Department of Physics, University of Coimbra, P–3004–516 Coimbra, Portugal
2 KU Leuven Campus Kortrijk – KULAK, Department of Physics, Etienne Sabbelaan 53 bus 7657, 8500 Kortrijk, Belgium
3 Ghent University, Department of Physics and Astronomy, Krijgslaan 281-S9, 9000 Gent, Belgium
* Speaker, e-mail: firstname.lastname@example.org
Published online: 26 March 2018
We report on the lattice computation of the Landau gauge gluon propagator at finite temperature, including the non-zero Matsubara frequencies. Moreover, the corresponding Källén-Lehmann spectral density is computed, using a Tikhonov regularisation together with the Morozov discrepancy principle. Implications for gluon confinement are also discussed.
© The Authors, published by EDP Sciences, 2018
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