329 citations · 3.6k across the 77 of their papers we have counts for
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Topological susceptibility in two-flavor QCD
Thomas DeGrand, Stefan Schaefer
We compute the topological susceptibility in QCD with two flavors of dynamical fermions using numerical simulation with overlap fermions.
Diquark effects in light baryon correlators from lattice QCD
Thomas DeGrand, Zhaofeng Liu, Stefan Schaefer
We study the role of diquarks in light baryons through point to point baryon correlators. We contrast results from quenched simulations with ones with two flavors of dynamical over…
Non-perturbative improvement of nHYP smeared Wilson fermions
Roland Hoffmann, Anna Hasenfratz, Stefan Schaefer
Using Schroedinger functional techniques, we determine the coefficient of the clover term necessary for non-perturbative O(a) improvement of hypercubic smeared Wilson fermions on a…
The impact of localized overlap eigenmodes on RMT measurements and topology
Anna Hasenfratz, Roland Hoffmann, Stefan Schaefer
The low energy eigenmodes of the continuum QCD Dirac operator are extended, but on the lattice, due to discretization effects, the Dirac operator can have localized eigenmodes. The…
Dynamical simulations with HYP-link Wilson fermions
Anna Hasenfratz, Roland Hoffmann, Stefan Schaefer
We present results from simulations of two dynamical flavors of improved Wilson fermions with nHYP smeared gauge links. We demonstrate that the simulation is stable at a pseudo-sca…
The complete lowest order chiral Lagrangian from a little box
Thomas DeGrand, Stefan Schaefer
We recently performed a pilot study determining the parameters of the leading order chiral Lagrangian from distributions of the eigenvalues of a quenched Dirac operator coupled to…
Localized eigenmodes of the overlap operator and their impact on the eigenvalue distribution
Anna Hasenfratz, Roland Hoffmann, Stefan Schaefer
In a system where chiral symmetry is spontaneously broken, the low energy eigenmodes of the continuum Dirac operator are extended. On the lattice, due to discretization effects, th…
Parameters of the lowest order chiral Lagrangian from fermion eigenvalues
Thomas DeGrand, Stefan Schaefer
Recent advances in Random Matrix Theory enable one to determine the pseudoscalar decay constant from the response of eigenmodes of quenched fermions to an imaginary isospin chemica…
Hypercubic Smeared Links for Dynamical Fermions
Anna Hasenfratz, Roland Hoffmann, Stefan Schaefer
We investigate a variant of hypercubic gauge link smearing where the SU(3) projection is replaced with a normalization to the corresponding unitary group. This smearing is differen…