Nucleon, Delta and Omega excited state spectra at three pion mass values

Details Nucleon, Delta and Omega excited state spectra at three pion mass values Nucleon, Delta and Omega excited state spectra at three pion mass values

2010-11-05

arxiv.org/abs/1011.1509v1

PoS Lattice2010:129,2010

Physics

High Energy Physics

High Energy Physics - Lattice

The XXVIII International Symposium on Lattice Field Theory, June 14-19, 2010, Villasimius, Sardinia Italy // 7 pages, 3 figure

Scientific paper

The energies of the excited states of the Nucleon, Delta and Omega are computed in lattice QCD, using two light quarks and one strange quark on anisotropic lattices. The calculations are performed at three values of the pion mass: 392(4), 438(3) and 521(3) MeV. We employ the variational method with a basis of about ten interpolating operators enabling six energies to be distinguished clearly in each irreducible representation of the octahedral group. We compare our calculations of nucleon excited states with the low-lying experimental spectrum. There is reasonable agreement for the pattern of states.

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