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arxiv: 0912.1753 · v1 · submitted 2009-12-09 · ✦ hep-ph · nucl-th

Quark Condensate and Effective Action from Dyson--Schwinger Equations

classification ✦ hep-ph nucl-th
keywords quarkcondensateobtainactioncondensate-drivenconsiderconsiderationcontribution
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We obtain the QCD quark condensate from consideration of unquenched quark dynamics in Dyson-Schwinger gluon vacuum. We consider the non-local extension of the condensate and determine the quark virtuality. We also obtain the condensate-driven contribution of the non-perturbative QCD to Euler--Heisenberg Lagrangian of QED in external electromagnetic fields.

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