Effective potential for a covariantly constant gauge field in curved spacetime

Details Effective potential for a covariantly constant gauge field in curved spacetime Effective potential for a covariantly constant gauge field in curved spacetime

1996-07-24

arxiv.org/abs/hep-th/9607189v1

Phys.Rev.D54:4152-4159,1996

Physics

High Energy Physics

High Energy Physics - Theory

accepted in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.54.4152

We discuss the influence of gravitational effects on the stabilization of the chromomagnetic vacuum. The one-loop effective potential for a covariantly constant SU(2) gauge field in ${\bf S}^2 \times {\bf R}^2$ and ${\bf T}^2 \times {\bf R}^2$ is calculated. A possibility of curvature-induced phase transitions between zero and nonzero chromomagnetic vacua is found ---what is also confirmed through the calculation of the renormalization group (RG) improved effective potential on constant-curvature spaces with small curvature. Numerical evaluation indicates that for some curvatures the imaginary part of the effective potential disappears (gravitational stabilization of the chromomagnetic vacuum occurs).

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