arXiv:hep-ph/9911398·v1·High Energy Physics — Phenomenology
Gluon Condensate and Non-Perturbative Quark-Photon Vertex
M. G. Mustafa (Univ. Giessen, Germany)🇩🇪 · A. Schaefer (Univ. Regensburg, Germany)🇩🇪 · M. H. Thoma (CERN, Switzerland)🇨🇭
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.
Comments: 9 pages including two figures