102 citations · 1.1k across the 57 of their papers we have counts for
9 papers · 2 filters
Variational method for lattice spectroscopy with ghosts
Tommy Burch, Christof Gattringer, Leonid Ya. Glozman +2
We discuss the variational method used in lattice spectroscopy calculations. In particular we address the role of ghost contributions which appear in quenched or partially quenched…
A lattice calculation of the pion form factor with Ginsparg-Wilson-type fermions
Stefano Capitani, Christof Gattringer, C. B. Lang
Results for Monte Carlo calculations of the electromagnetic vector and scalar form factors of the pion in a quenched simulation are presented. We work with two different lattice vo…
Low energy constants from the chirally improved Dirac operator D_CI
Christof Gattringer, Philipp Huber, C. B. Lang
The leading order low energy parameters like the pion decay constant or the quark condensate are well-known from "classical" low energy theorems and experiments. It is a challenge,…
Excited meson spectroscopy with chirally improved fermions
T. Burch, C. Gattringer, L. Glozman +4
We present excited meson masses from quenched calculations using chirally improved (CI) quarks at pion masses down to 350 MeV. The salient features of our analysis are the use of a…
Low-lying spectrum for lattice Dirac operators with twisted mass
Christof Gattringer, Stefan Solbrig
We analyze the low-lying spectrum and eigenmodes of lattice Dirac operators with a twisted mass term. The twist term expels the eigenvalues from a strip in the complex plane and al…
Topologically non-trivial field configurations - interplay of vortices and Dirac eigenmodes
Stefan Solbrig, Jochen Gattnar, Christof Gattringer +4
Gluon field configurations with non-trivial topology like instantons, magnetic monopoles and center vortices play a crucial role in QCD and, in particular, for the spontaneous brea…