Vacuum Condensates and the Anomalous Magnetic Moment of a Dirac Fermion
Victor Elias, Kevin Sprague, and Ying Xue
TL;DR
This paper explores how nonperturbative vacuum condensates in quantum chromodynamics could influence the anomalous magnetic moment of a Dirac fermion, potentially explaining observed baryon magnetic properties.
Contribution
It introduces the consideration of vacuum condensate contributions to the fermion-photon vertex, linking nonperturbative effects to magnetic moment calculations.
Findings
Vacuum condensates may cause the anomalous magnetic moment to vanish.
Condensates could reconcile baryon magnetic moments with baryon spectroscopy.
Nonperturbative effects are significant in fermion magnetic properties.
Abstract
We address anticipated fermion-antifermion and dimension-4 gauge-field vacuum-condensate contributions to the magnetic portion of the fermion-photon vertex function in the presence of a vacuum with nonperturbative content, such as that of QCD. We discuss how inclusion of such condensate contributions may lead to a vanishing anomalous magnetic moment, in which case vacuum condensates may account for the apparent consistency between constituent quark masses characterizing baryon magnetic moments and those characterizing baryon spectroscopy.
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Taxonomy
TopicsPhysics of Superconductivity and Magnetism · Quantum Chromodynamics and Particle Interactions · Quantum, superfluid, helium dynamics