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Determining Fpi from spectral sum rules

Magdalena Luz

hep-latarXiv:hep-lat/0607022

Abstract

We derive spectral sum rules for a system with two quarks coupled to an imaginary isospin chemical potential in the εregime. The sum rules show an explicit dependence on the pion decay constant which should make it possible to measure Fpi from the eigenvalue spectrum of this particular Dirac operator.

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