We present first results for masses of spin-3/2 baryons in lattice QCD, using a novel fat-link clover fermion action in which only the irrelevant operators are constructed using fat links. In the isospin-1/2 sector, we observe, after appropriate spin and parity projection, a strong signal for the J^P=3/2^- state, and find good agreement between the 1/2^+ mass and earlier nucleon mass simulations with a spin-1/2 interpolating field. For the isospin-3/2 Delta states, clear mass splittings are observed between the various 1/2^+/- and 3/2^+/- channels, with the calculated level orderings in good agreement with those observed empirically.
@article{arxiv.hep-lat/0210043,
title = {Spin-3/2 Baryons in Lattice QCD},
author = {J. M. Zanotti and S. Choe and D. B. Leinweber and W. Melnitchouk and A. G. Williams and J. B. Zhang},
journal= {arXiv preprint arXiv:hep-lat/0210043},
year = {2010}
}
Comments
3 pages, 2 figures, Lattice2002(QCD Spectrum and Quark Masses)