1997/08/09 by M. Reuter, C. Wetterich · 1 citation
Mathematics · Physics and Astronomy · #Action (physics) #Black Holes and Theoretical Physics #Combinatorics #Condensation #Conjecture #Constant (computer programming) #Effective action #Flow (mathematics) #Gluon #Gluon condensate #High-Energy Particle Collisions Research #Mathematical physics #Mathematics #Mechanics #Operator (biology) #Particle physics #Physics #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Quark #Thermodynamics #hep-th
paper · pdf · doi:10.1103/physrevd.56.7893
published as Phys.Rev. D56 (1997) 7893-7916 · 64 pages, latex
arxiv created 1997/08/09 · openalex publication_date 1997/12/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We employ nonperturbative flow equations for an investigation of the effective action in Yang-Mills theories. We compute the effective action \ensuremathΓ[B] for constant color magnetic fields B and examine Savvidy's conjecture of an unstable perturbative vacuum. Our results indicate that the absolute minimum of \ensuremathΓ[B] occurs for B=0. Gluon condensation is described by a nonvanishing expectation value of the regularized composite operator F_\ensuremathμ\ensuremathνF^\ensuremathμ\ensuremathν which agrees with phenomenological estimates.