Parameters of the lowest order chiral Lagrangian from fermion eigenvalues

Abstract

Recent advances in Random Matrix Theory enable one to determine the pseudoscalar decay constant from the response of eigenmodes of quenched fermions to an imaginary isospin chemical potential. We perform a pilot test of this idea, from simulations with two flavors of dynamical overlap fermions.

Comments: 11 pages, 7 figures, Revtex