We present progress made by the Hadron Spectrum Collaboration (HSC) in determining the tower of excited nucleon states using 2+1-flavor anisotropic clover lattices. The HSC has been investigating interpolating operators projected into irreducible representations of the cubic group in order to better calculate two-point correlators for nucleon spectroscopy; results are published for quenched and 2-flavor anisotropic Wilson lattices. In this work, we present the latest results using a new technique, distillation, which allows us to reach higher statistics than before. Future directions will be outlined at the end.
@article{arxiv.0911.3373,
title = {Excited-Nucleon Spectroscopy with 2+1 Fermion Flavors},
author = {Saul Cohen and John M. Bulava and Justin Foley and Colin Morningstar and Ricky Wong and Robert G. Edwards and Balint Joo and David G. Richards and K. Jimmy Juge and Huey-Wen Lin and Nilmani Mathur and Michael J. Peardon and Sinead M. Ryan},
journal= {arXiv preprint arXiv:0911.3373},
year = {2010}
}
Comments
7 pages, 3 figures. Presented at the XXVII International Symposium on Lattice Field Theory, July 26-31, 2009, Peking University, Beijing