Euclidean Yang-Mills theory in constant background fields and unstable modes

Autor:	E. Wieczorek, H.J. Kaiser, K. Scharnhorst
Rok vydání:	1990
Předmět:	Physics High Energy Physics::Theory Nuclear and High Energy Physics Theoretical physics Basis (linear algebra) Quantum mechanics Euclidean geometry Propagator Limit (mathematics) Yang–Mills theory Quantum field theory Constant (mathematics) Effective action
Zdroj:	Journal of Physics G: Nuclear and Particle Physics. 16:161-174
ISSN:	1361-6471 0954-3899
DOI:	10.1088/0954-3899/16/2/005
Popis:	Within Euclidean SU(2) Yang-Mills theory considered in certain constant 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7d3a76d6faac013c3966c110649d6a21 https://doi.org/10.1088/0954-3899/16/2/005 Zobrazit plný text záznamu