Physics results from dynamical overlap fermion simulations

Abstract

I summarize the physics results obtained from large-scale dynamical overlap fermion simulations by the JLQCD and TWQCD collaborations. The numerical simulations are performed at a fixed global topological sector; the physics results in the theta-vacuum is reconstructed by correcting the finite volume effect, for which the measurement of the topological susceptibility is crucial. Physics applications we studied so far include a calculation of chiral condensate, pion mass, decay constant, form factors, as well as (vector and axial-vector) vacuum polarization functions and nucleon sigma term.

15 pages, a plenary talk presented at the 26th International Symposium on Lattice Field Theory (Lattice 2008), Williamsburg, Virginia, USA, July 14-19, 2008

References in corpus (18)

• Nucleon sigma term and strange quark content from lattice QCD with exact chiral symmetry
• Finite volume QCD at fixed topological charge
• Lattice gauge action suppressing near-zero modes of H_W
• Two-flavor lattice QCD simulation in the epsilon-regime with exact chiral symmetry
• Two-flavor QCD simulation with exact chiral symmetry
• Convergence of the chiral expansion in two-flavor lattice QCD
• Topological susceptibility in two-flavor lattice QCD with exact chiral symmetry
• Gap Domain Wall Fermions
• S-parameter and pseudo-Nambu-Goldstone boson mass from lattice QCD
• Lattice study of meson correlators in the epsilon-regime of two-flavor QCD
• pi pi scattering
• Lattice study of vacuum polarization function and determination of strong coupling constant
• B_K with two flavors of dynamical overlap fermions
• Pion vector and scalar form factors with dynamical overlap quarks
• Calculation of the nucleon sigma term and strange quark content with two flavors of dynamical overlap fermions
• Topological susceptibility in (2+1)-flavor lattice QCD with overlap fermion
• Exploring the chiral regime with dynamical overlap fermions
• Light meson spectrum with $N_f=2$ dynamical overlap fermions

Cited by in corpus (4)

• The epsilon regime of chiral perturbation theory with Wilson-type fermions
• Modifying the molecular dynamics action to increase topological tunnelling rate for dynamical overlap fermions
• Spontaneous chiral symmetry breaking on the lattice
• O(a^2) improvement of the overlap-Dirac operator