Variational method for lattice spectroscopy with ghosts
classification
✦ hep-lat
keywords
ghostslatticemethodquenchedspectroscopyvariationaladdressappear
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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.
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