H.J. Kaiser, K. Scharnhorst, E. Wieczorek: *Euclidean Yang-Mills
theory in constant background fields and unstable modes*. Journal of Physics G:
Nuclear and Particle Physics **16**(1990)161-174
(DOI: 10.1088/0954-3899/16/2/005).
[SPIRES record]

**Abstract**:
Within Euclidean SU(2) Yang-Mills theory considered in certain non-Abelian background
fields the explicit construction of gluon and ghost Green functions is presented,
paying special attention to unstable modes. The propagators obtained turn out to be
purely real. The propagator expressions given for two different background fields are
related to each other in the coincidence limit of these background configurations.
On the basis of the derived results the imaginary part of the Euclidean Yang-Mills
theory effective action is discussed, showing that no higher-loop corrections beyond
the well known 1-loop result appear. Also arguments are given that the 1-loop imaginary
part should not be trusted.

- Electronic copy of the article: Journal of Physics G: Nuclear and Particle Physics
- Electronic copy of the preprint version - IfH Berlin-Zeuthen Preprint PHE 89-6: scanned preprint (KEK library) [local copy: PDF (613 kB), gzipped PS (619 kB), DJVU (606 kB)]
- Citations
- Misprints, errata, addenda:

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