Determination of the chiral condensate from QCD Dirac spectrum on the lattice
Journal
Physical Review D - Particles, Fields, Gravitation and Cosmology
Journal Volume
83
Journal Issue
7
Date Issued
2011
Author(s)
Abstract
We calculate the chiral condensate of QCD with 2, 2+1, and 3 flavors of sea quarks. Lattice QCD simulations are performed employing dynamical overlap fermions with up- and down-quark masses covering a range between 3 and 100 MeV. On L∼1.8-1.9fm lattices at a lattice spacing ∼0.11fm, we calculate the eigenvalue spectrum of the overlap-Dirac operator. By matching the lattice data with the analytical prediction from chiral perturbation theory at the next-to-leading order, the chiral condensate in the massless limit of up and down quarks is determined. © 2011 American Physical Society.
SDGs
Type
journal article