The calculation of the light-hadron spectrum in the quenched approximation to QCD using an anisotropic clover fermion action is presented. The tuning of the parameters of the action is discussed, using the pion and rho dispersion relation. The adoption of an anisotropic lattice provides clear advantages in the determination of the baryonic resonances, and in particular that of the so-called Roper resonance, the lightest radial excitation of the nucleon.
@article{arxiv.hep-lat/0303004,
title = {Spectroscopy using the Anisotropic Clover Action},
author = {LHP Collaboration and R. G. Edwards and U. M. Heller and D. G. Richards},
journal= {arXiv preprint arXiv:hep-lat/0303004},
year = {2014}
}
Comments
Lattice2002(spectrum), 3 pages, 3 figures, to appear in Proceedings of Lattice 2002