The condensate for two dynamical chirally improved quarks in QCD

Abstract

We compare the eigenvalue spectra of the Dirac operator from a simulation with two mass degenerate dynamical chirally improved fermions with Random Matrix Theory. Comparisons with distribution of k-th eigenvalues (k=1,2) in fixed topological sectors (nu=0,1) are carried out using the Kolmogorov-Smirnov test. The eigenvalue distributions are well described by the RMT predictions. The match allows us to read off the quark condensate in the chiral limit directly. Correcting for finite size and renormalization we obtain a mean value of -(276 (11)(16) MeV)**3 in the MS-bar scheme.

8 pages, 2 figures, Final version. To be published

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• Determination of the chiral condensate from QCD Dirac spectrum on the lattice
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• Chiral condensate from the twisted mass Dirac operator spectrum
• Lattice study of meson correlators in the epsilon-regime of two-flavor QCD
• Parameters of the lowest order chiral Lagrangian from fermion eigenvalues
• Probing the chiral regime of Nf=2 QCD with mixed actions
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• Testing chiral effective theory with quenched lattice QCD
• Reweighting QCD simulations with dynamical overlap fermions
• The complete lowest order chiral Lagrangian from a little box
• Random Matrix Theory at Nonzero $\mu$ and $T$