Overlap valence quarks on a twisted mass sea: a case study for mixed action Lattice QCD
arXiv:1211.1605 · doi:10.1016/j.nuclphysb.2012.12.011
Abstract
We discuss a Lattice QCD mixed action investigation employing Wilson maximally twisted mass sea and overlap valence fermions. Using four values of the lattice spacing, we demonstrate that the overlap Dirac operator assumes a point-like locality in the continuum limit. We also show that by adopting suitable matching conditions for the sea and valence theories a consistent continuum limit for the pion decay constant and light baryon masses can be obtained. Finally, we confront results for sea-valence mixed meson masses and the valence scalar correlator with corresponding expressions of chiral perturbation theory. This allows us to extract low energy constants of mixed action chiral perturbation which characterize the strength of unitarity violations in our mixed action setup.
46 pages, 18 figures
References in corpus (23)
- Light hadrons from lattice QCD with light (u,d), strange and charm dynamical quarks
- Light hadron spectroscopy using domain wall valence quarks on an Asqtad sea
- Light baryon masses with dynamical twisted mass fermions
- Lattice gauge action suppressing near-zero modes of H_W
- Computing K and D meson masses with N_f = 2+1+1 twisted mass lattice QCD
- Overlap Valence on 2+1 Flavor Domain Wall Fermion Configurations with Deflation and Low-mode Substitution
- Two-flavor QCD simulation with exact chiral symmetry
- Two Meson Systems with Ginsparg-Wilson Valence Quarks
- f_K/f_pi in Full QCD with Domain Wall Valence Quarks
- BK-parameter from Nf = 2 twisted mass lattice QCD
- Lower Higgs boson mass bounds from a chirally invariant lattice Higgs-Yukawa model with overlap fermions
- Mixed Meson Masses with Domain-Wall Valence and Staggered Sea Fermions
- Discretization effects and the scalar meson correlator in mixed-action lattice simulations
- Discretization errors in the spectrum of the Hermitian Wilson-Dirac operator
- Mixed Action Effective Field Theory: an Addendum
- Probing the chiral regime of Nf=2 QCD with mixed actions
- Higgs boson mass bounds in the presence of a very heavy fourth quark generation
- Topological tunneling with Dynamical overlap fermions
- Pseudoscalar decay constants from N_f=2+1+1 twisted mass lattice QCD
- Continuum Limit of Overlap Valence Quarks on a Twisted Mass Sea
- Flavor symmetry breaking in lattice QCD with a mixed action
- Towards Four-Flavour Dynamical Simulations
- Exploratory study of the D_s spectrum in 2+1 Domain Wall QCD with heavy overlap