arXiv:hep-lat/0511054·v1·High Energy Physics — Lattice
Variational method for lattice spectroscopy with ghosts
Tommy Burch🇩🇪 · Christof Gattringer🇦🇹 · Leonid Ya. Glozman🇦🇹 · Christian Hagen🇩🇪 · C.B. Lang🇦🇹
Abstract
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 simulations and have a non-standard euclidean time dependence. We show that the ghosts can be separated from the physical states. Our result is illustrated with numerical data for the scalar meson.
Comments: 4 pages, 1 figure