Lattice study of meson correlators in the epsilon-regime of two-flavor QCD
Nov, 2007Citations per year
Abstract: (arXiv)
We calculate mesonic two-point functions in the epsilon-regime of two-flavor QCD on the lattice with exact chiral symmetry. We use gauge configurations of size 16^3 32 at the lattice spacing a \sim 0.11 fm generated with dynamical overlap fermions. The sea quark mass is fixed at \sim 3 MeV and the valence quark mass is varied in the range 1-4 MeV, both of which are in the epsilon-regime. We find a good consistency with the expectations from the next-to-leading order calculation in the epsilon-expansion of (partially quenched) chiral perturbation theory. From a fit we obtain the pion decay constant F=87.3(5.6) MeV and the chiral condensate Sigma^{MS}=[239.8(4.0) MeV ]^3 up to next-to-next-to-leading order contributions.- 12.38.Gc
- lattice field theory
- flavor: 2
- quantum chromodynamics
- meson: two-point function
- perturbation theory: chiral
- fermion: overlap
- epsilon expansion
- pi: decay constant
- correlation function: axial-vector
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