Achhammer, M. and Heinz, Ulrich and Leupold, S. and Wiedemann, Urs Achim (1997) Gauge invariance of resummation schemes: The QCD partition function. ANNALS OF PHYSICS, 261 (1). pp. 1-36. ISSN 0003-4916, 1096-035X
Full text not available from this repository.Abstract
We pick up a method originally developed by Cheng and Tsai for vacuum perturbation theory which allows to test the consistency of different sets of Feynman rules on a purely diagrammatic level, making explicit loop calculations superfluous. We generalize it to perturbative calculations in thermal field theory and we show that it can be adapted to check the gauge invariance of physical quantities calculated in improved perturbation schemes. Specifically, we extend this diagrammatic technique to a simple resummation scheme in imaginary time perturbation theory. In this resummation scheme, the QCD partition function was calculated recently in Feynman gauge. To illustrate our method, we establish the invariance of this result under general covariant gauge transformations up to O(g(4)). (C) 1997 Academic Press.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 3-LOOP FREE-ENERGY; HIGH-TEMPERATURE; FINITE TEMPERATURE; PHASE-TRANSITIONS; LEADING ORDER; FIELD-THEORY; THERMODYNAMICS; IDENTITIES; PROPAGATOR; FERMIONS |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Mar 2023 07:31 |
| Last Modified: | 02 Mar 2023 07:31 |
| URI: | https://pred.uni-regensburg.de/id/eprint/50404 |
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