Pion susceptibility of the QCD vacuum from an effective quark-quark interaction
classification
✦ hep-ph
keywords
pionsusceptibilityvacuumeffectiveinteractionquark-quarkapproachcalculating
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A modified method for calculating the pion vacuum susceptibility from an effective quark-quark interaction model is derived. Within this approach it is shown that the pion vacuum susceptibility is free of ultraviolet divergence and is much smaller than the previous estimations.
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