6 papers
Scaling test of two-flavor O(a)-improved lattice QCD
Michele Della Morte, Patrick Fritzsch, Harvey B. Meyer +5
We report on a scaling test of several mesonic observables in the non-perturbatively O(a) improved Wilson theory with two flavors of dynamical quarks. The observables are construct…
Cluster simulation of two-dimensional relativistic fermions
Ulli Wolff
The (discrete) Gross-Neveu model is studied in a lattice realization with an N-component Majorana Wilson fermion field. It has an internal O(N) symmetry in addition to the euclidea…
Spectral properties of the non-hermitian Wilson-Dirac operator in the Schroedinger functional
Oliver Witzel, Shinji Takeda, Ulli Wolff
We report on some preparatory investigations for the simulation of the QCD Schroedinger functional with a non-hermitian polynomial hybrid Monte Carlo algorithm. The complex spectru…
Cluster simulation of relativistic fermions in two space-time dimensions
Ulli Wolff
For Majorana-Wilson lattice fermions in two dimensions we derive a dimer representation. This is equivalent to Gattringer's loop representation, but is made exact here on the torus…
Towards a non-perturbative computation of the RGI strange quark mass with two dynamical flavors
Michele Della Morte, Roland Hoffmann, Francesco Knechtli +4
The non-perturbative running of the quark mass in the Schroedinger functional scheme is computed over a large energy range (covering scales differing by two orders of magnitude). T…
Cutoff effects in the O(N) sigma model at large N
Ulli Wolff, Francesco Knechtli, Bjoern Leder +1
The computation of the step scaling function for the finite size mass-gap in the O(N) sigma model at large N is reviewed. Practically exact nonperturbative results become available…