Gluon Condensate and Non-Perturbative Quark-Photon Vertex
M. G. Mustafa, A. Schaefer, M. H. Thoma
Abstract
We evaluate the quark-photon vertex non-perturbatively taking into account the gluon condensate at finite temperature. This vertex is related to the previously derived effective quark propagator by a QED like Ward-Takahashi identity. The importance of the effective vertex for the dilepton production rate from a quark-gluon plasma is stressed.
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