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The pion-pion scattering phase shift is computed using LapH propagators. The LapH method for computing quark propagators is used to form two-particle correlation functions with a number of different o...
Improved method for calculating nucleon strangeness
Improved method for calculating nucleon strangeness
2011/1/7
The strange quark content of the nucleon, as well as other matrix elements, can be calculated on the lattice by examining correlations between the nucleon propagator and the quark condensate. The larg...
Recently, the Fermilab heavy-quark action was extended to include dimension-six and -seven operators in order to reduce the discretization errors. In this talk, we present results of the first numeric...
Autocorrelations in Hybrid Monte Carlo Simulations
Autocorrelations Hybrid Monte Carlo Simulations
2011/1/7
Simulations of QCD suffer from severe critical slowing down towards the continuum limit. This problem is known to be prominent in the topological charge, however, all observables are affected to vario...
Effects of dynamical quarks on the spectrum of the Wilson Dirac operator
Effects of dynamical quarks the Wilson Dirac operator
2011/1/7
Effects of dynamical quarks on the microscopic spectrum of the Wilson Dirac operator are analyzed by means of effective field theory. We consider the distributions of the real modes of the Wilson Dira...
Wilson Fermions, Random Matrix Theory and the Aoki Phase
Wilson Fermions Random Matrix Theory the Aoki Phase
2011/1/7
The QCD partition function for the Wilson Dirac operator, $D_W$, at nonzero lattice spacing $a$ can be expressed in terms of a chiral Lagrangian as a systematic expansion in the quark mass, the moment...
Properties of the approximate Yang-Mills ground-state wave functional in 2+1 dimensions
Yang-Mills ground-state wave functional 2+1 dimensions
2011/1/7
We review properties and lattice evidence in support of the recently proposed temporal-gauge Yang-Mills vacuum wave functional in 2+1 dimensions.
SU(2) lattice gluon propagators at finite temperatures in the deep infrared region and Gribov copy effects
SU(2) lattice gluon propagators infrared region Gribov copy effects
2011/1/7
We study numerically the SU(2) Landau gauge transverse and longitudinal gluon propagators at non-zero temperatures T both in confinement and deconfinement phases. The special attention is paid to the ...
Instantaneous interquark potential in generalized Landau gauge in SU(3) lattice QCD: a possible gauge for the quark potential model
Instantaneous interquark potential SU(3) lattice QCD
2011/1/7
We investigate "instantaneous interquark potential", an interesting gauge-dependent quantity defined from the spatial correlator $<\mathrm{Tr} [U_4^\dagger(s)U_4(s')]>$ of the temporal link-variable $...
Non-chiral current algebras for deformed supergroup WZW models
Non-chiral current algebras deformed supergroup WZW models
2010/12/24
We study deformed WZW models on supergroups with vanishing Killing form. The deformation is generated by the isotropic current-current perturbation which is exactly marginal under these assumptions. I...
The order of the deconfinement phase transition in a heavy quark mass region
the deconfinement phase transition quark mass region
2011/1/7
We study the quark mass dependence of the QCD phase transition by an effective potential defined through the distribution function of observables. As a test of the method, we study the first order dec...
Spectral properties in supersymmetric matrix models
Spectral properties supersymmetric matrix models
2010/12/24
We give a sufficient condition for discreteness of the spectrum for supersymmmetric and non supersymmetric theories with a fermionic contribution. Our approach allows the analysis of the complete redu...
K --> pi pi matrix elements from mixed action lattice QCD
K --> pi pi matrix elements mixed action lattice QCD
2011/1/7
We present a new method for determining K --> pi pi matrix elements from lattice simulations that is less costly than direct simulations of K --> pi pi at physical kinematics. It improves, however, up...
We study an accurate method for the lattice calculation of the B*Bpi Coupling in the static limit, paying particular attention to excited state contamination. As this coupling is a parameter of the he...
We revisit the study of the maximally singular point in the Coulomb branch of 4d N=2 SU(N) gauge theory with N_f=2n flavors for N_f<2N. When n >= 2, we find that the low-energy physics is described b...