N* Mass Spectrum from an Anisotropic Action

Details N* Mass Spectrum from an Anisotropic Action N* Mass Spectrum from an Anisotropic Action

2000-11-13

arxiv.org/abs/hep-lat/0011060v1

Nucl.Phys.Proc.Suppl. 94 (2001) 251-254

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice 2000 (Spectrum), 4 pages, 4 figures

Scientific paper

10.1016/S0920-5632(01)00969-0

Results are reported for N* masses in the 1/2+ and 1/2- sectors on an anisotropic lattice. The gauge action is the usual plaquette plus rectangle type, the quark action is of the D234 type, both having tadpole-improved tree-level coefficients. Clear splittings from the nucleon ground state are observed with smeared operators and 500 configurations. The first excited states in each channel are further isolated, using a correlation matrix and the variational method. The basic pattern of these splittings is consistent with experimental observations.

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