Analytic structure of an Ansatz nonperturbative quark propagator, and phenomenological restrictions (CROSBI ID 646500)
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Klabučar, Dubravko ; Kekez, Dalibor
engleski
Analytic structure of an Ansatz nonperturbative quark propagator, and phenomenological restrictions
The analytic structure of certain Ansaetze for quark propagators in the nonperturbative regime of QCD is investigated. When choosing physically motivated parameterization of the momentum-dependent dressed quark mass function M(p2), with definite analytic structure, it is highly nontrivial to predict and control the analytic structure of the corresponding nonperturbative quark propagator. The issue of the Wick rotation relating the Minkowski-space and Euclidean-space formulations is also highly nontrivial in the nonperturbative case. A propagator form allowing the Wick rotation and enabling equivalent calculations in Minkowski and Euclidean spaces is presented.
quark propagator, nonperturbative QCD, analytic structure
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Podaci o skupu
AUSTRIAN-CROATIAN-HUNGARIAN 2016 MEETING (ACHT 2016) Non-perturbative aspects of Quantum Field Theory
ostalo
05.10.2016-07.10.2016
Čakovec, Hrvatska