Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-11-17
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages; LaTeX, uses sprocl.sty - Invited talk presented by HTE at the workshop ``Collective Excitations in Fermi and Bose Sy
Scientific paper
Vacuum polarization mediated by quark loops is susceptible to external electromagnetic fields as well as to the QCD vacuum structure. Employing the stochastic vacuum model, we calculate the modification of the one-loop Euler-Heisenberg effective action due to stochastic color fields with the Fock-Schwinger technique. Our results indicate nonperturbative light quark contributions of the same order of magnitude as the usual QED terms. Various theoretical and experimental implications are discussed in this progress report.
Elze H.-Th.
Müller Berndt
Rafelski Johann
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