Indications for Gluon Condensation from Nonperturbative Flow Equations
M. Reuter, C. Wetterich
TL;DR
This paper uses nonperturbative flow equations to analyze Yang-Mills theories and finds that the true vacuum involves a nonzero gluon condensate, challenging the perturbative vacuum assumption.
Contribution
It introduces a nonperturbative flow equation approach to identify the true ground state of Yang-Mills theories with a nonvanishing gluon condensate.
Findings
Perturbative vacuum is not the true minimum of the effective action.
The true ground state features a nonzero gluon condensate.
Nonperturbative methods reveal the vacuum structure in Yang-Mills theories.
Abstract
We employ nonperturbative flow equations for the description of the effective action in Yang-Mills theories. We find that the perturbative vacuum with vanishing gauge field strength does not correspond to the minimum of the Euclidean effective action. The true ground state is characterized by a nonvanishing gluon condensate.
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Taxonomy
TopicsHigh-Energy Particle Collisions Research · Superconducting Materials and Applications · Quantum Chromodynamics and Particle Interactions