Gluon Condensate and Non-Perturbative Quark-Photon Vertex
M. G. Mustafa (Univ. Giessen, Germany), A. Schaefer (Univ. Regensburg,, Germany), M. H. Thoma (CERN, Switzerland)
TL;DR
This paper non-perturbatively evaluates the quark-photon vertex considering the gluon condensate at finite temperature, highlighting its significance for dilepton production in quark-gluon plasma.
Contribution
It introduces a non-perturbative calculation of the quark-photon vertex including gluon condensate effects at finite temperature, linked via Ward-Takahashi identity.
Findings
Effective vertex impacts dilepton production rates.
Gluon condensate significantly modifies the quark-photon interaction.
Non-perturbative effects are crucial at finite temperature.
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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