Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-08-10
Phys.Lett.B549:146-153,2002
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 2 figures, LaTeX2e; v2: minor corrections, to be published in Phys.Lett.B
Scientific paper
10.1016/S0370-2693(02)02888-5
We show that gluodynamics in an external Abelian electromagnetic field should possess a deconfining phase transition at zero temperature. Our analytical estimation of the critical external field is based on the dual superconductor picture which is formulated in the Euclidean space suitable for lattice calculations. A dual superconductor model corresponding to the SU(2) gluodynamics possesses confinement and deconfinement phases below and, respectively, above the critical field. A dual superconductor model for the SU(3) gauge theory predicts a rich phase structure containing confinement, asymmetric confinement and deconfinement phases. The quark bound states in these phases are analyzed. Inside the baryon the strings are Y--shaped as predicted by the dual superconductor picture. This shape is geometrically asymmetric in the asymmetric confinement phases. The results of the paper can be used to check the dual superconductor mechanism in gluodynamics.
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