First results from 2+1-Flavor Domain Wall QCD: Mass Spectrum, Topology Change and Chiral Symmetry with $L_s=8$

Abstract

We present results for the static interquark potential, light meson and baryon masses, and light pseudoscalar meson decay constants obtained from simulations of domain wall QCD with one dynamical flavour approximating the $s$ quark, and two degenerate dynamical flavours with input bare masses ranging from $m_s$ to $m_s/4$ approximating the $u$ and $d$ quarks. We compare these quantities obtained using the Iwasaki and DBW2 improved gauge actions, and actions with larger rectangle coefficients, on $16^3\times 32$ lattices. We seek parameter values at which both the chiral symmetry breaking residual mass due to the finite lattice extent in the fifth dimension and the Monte Carlo time history for topological charge are acceptable for this set of quark masses at lattice spacings above 0.1 fm. We find that the Iwasaki gauge action is best, demonstrating the feasibility of using QCDOC to generate ensembles which are good representations of the QCD path integral on lattices of up to 3 fm in spatial extent with lattice spacings in the range 0.09-0.13 fm. Despite large residual masses and a limited number of sea quark mass values with which to perform chiral extrapolations, our results for light hadronic physics scale and agree with experimental measurements within our statistical uncertainties.

arXiv commentRBC and UKQCD Collaborations. 82 pages, 34 figures Typos corrected

References in corpus (31)

• A Method for Simulating Chiral Fermions on the Lattice
• A New Way to Set the Energy Scale in Lattice Gauge Theories and its Application to the Static Force and ${\alpha }_s$ in SU(2) Yang--Mills Theory
• The Chroma Software System for Lattice QCD
• Chiral Fermions from Lattice Boundaries
• Axial symmetries in lattice QCD with Kaplan fermions
• Infinitely many regulator fields for chiral fermions
• Chiral Fermions on the Lattice
• Precision computation of a low-energy reference scale in quenched lattice QCD
• Quenched Lattice QCD with Domain Wall Fermions and the Chiral Limit
• Topology of the SU(2) vacuum: a lattice study using improved cooling
• A Lattice Study of the Nucleon Excited States with Domain Wall Fermions
• Exact 2+1 flavour RHMC simulations
• Renormalization group flow of SU(3) lattice gauge theory - Numerical studies in a two coupling space
• The RHMC Algorithm for 2 Flavours of Dynamical Staggered Fermions
• Chiral Symmetry Restoration in the Schwinger Model with Domain Wall Fermions
• Domain wall fermions with improved gauge actions
• Lattice QCD with two dynamical flavors of domain wall quarks
• Light hadron spectroscopy with O(a) improved dynamical fermions
• Revealing Topological Structure in the SU(2) Vacuum
• Chiral properties of domain-wall quarks in quenched QCD
• A High Precision Study of the QQ(bar) Potential from Wilson Loops in the Regime of String Breaking
• Is the Quenched Spectrum in agreement with Experiment?
• The finite temperature QCD phase transition with domain wall fermions
• Excited Baryon Spectroscopy from Lattice QCD: Finite Size Effect and Hyperfine Mass Splitting
• Exploring the HMC trajectory-length dependence of autocorrelation times in lattice QCD
• Domain wall fermions in vector gauge theories
• Chirality Correlation within Dirac Eigenvectors from Domain Wall Fermions
• Improved cooling algorithm for gauge theories
• QCD hadron spectrum with domain wall fermions
• Quenched QCD with domain-wall fermions on coarse lattices
• Domain-Wall Fermions at Strong Coupling

Cited by in corpus (30)

• Ab-initio Determination of Light Hadron Masses
• Physical Results from 2+1 Flavor Domain Wall QCD and SU(2) Chiral Perturbation Theory
• Continuum Limit Physics from 2+1 Flavor Domain Wall QCD
• The chiral transition and U(1)_A symmetry restoration from lattice QCD using Domain Wall Fermions
• 2+1 flavor domain wall QCD on a (2 fm)^3 lattice: light meson spectroscopy with Ls = 16
• Non-perturbative renormalization of quark bilinear operators and B_K using domain wall fermions
• Calculation of the heavy-hadron axial couplings g_1, g_2, and g_3 using lattice QCD
• Continuum Limit of $B_K$ from 2+1 Flavor Domain Wall QCD
• A lattice investigation of exotic tetraquark channels
• Nucleon structure with two flavors of dynamical domain-wall fermions
• Lattice QCD at finite temperature and density
• Proton lifetime bounds from chirally symmetric lattice QCD
• Excited-state spectroscopy of triply-bottom baryons from lattice QCD
• Hadronic form factors in Lattice QCD at small and vanishing momentum transfer
• Step Scaling with off-shell renormalisation
• The finite temperature QCD using 2+1 flavors of domain wall fermions at N_t = 8
• Localization and chiral symmetry in 2+1 flavor domain wall QCD
• The bottomonium spectrum from lattice QCD with 2+1 flavors of domain wall fermions
• eta' meson From Two Flavor Dynamical Domain Wall Fermions
• Glueball Spectra from a Matrix Model of Pure Yang-Mills Theory
• Propagator of the lattice domain wall fermion and the staggered fermion
• Bottom hadron mass splittings in the static limit from 2+1 flavour lattice QCD
• Lattice simulations with G-parity Boundary Conditions
• Light Hadron Masses from a Matrix Model for QCD
• $K\to (\pi \pi {)}_{I=2}$ decays and twisted boundary conditions
• Aspects of Precision Calculations of Nucleon Generalized Form Factors with Domain Wall Fermions on an Asqtad Sea
• Chiral Limit and Light Quark Masses in 2+1 Flavor Domain Wall QCD
• A lattice Dirac operator for QCD with light dynamical quarks
• Recent algorithm and machine developments for lattice QCD
• Isospin symmetry breaking effects in the pion and nucleon masses