88 citations · 241 across the 9 of their papers we have counts for
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Low energy chiral constants from epsilon-regime simulations with improved Wilson fermions
Anna Hasenfratz, Roland Hoffmann, Stefan Schaefer
We present a lattice QCD calculation of the low energy constants of the leading order chiral Lagrangian. In these simulations the epsilon regime is reached by using tree-level impr…
Reweighting towards the chiral limit
Anna Hasenfratz, Roland Hoffmann, Stefan Schaefer
We propose to perform fully dynamical simulations at small quark masses by reweighting in the quark mass. This approach avoids some of the technical difficulties associated with di…
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.
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 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…