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

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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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John Bulava, Robert G. Edwards, Balint Joo, David G. Richards, Eric Engelson, Huey-Wen Lin, Colin Morningstar, Stephen J. Wallace June 1, 2010.

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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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129

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  • Journal Name: Proceedings of Science; Journal Volume: LATTICE2010; Conference: Lattice 2010, Villasimius, Sardinia, Italy, 14-19 Jun 2010.

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  • Report No.: JLAB-THY-10-1224
  • Report No.: DOE/OR/23177-1394
  • Report No.: arXiv:1011.1509
  • Grant Number: AC05-06OR23177
  • Office of Scientific & Technical Information Report Number: 1022607
  • Archival Resource Key: ark:/67531/metadc843264

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  • June 1, 2010

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 6:58 p.m.

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John Bulava, Robert G. Edwards, Balint Joo, David G. Richards, Eric Engelson, Huey-Wen Lin, Colin Morningstar, Stephen J. Wallace. Nucleon, Delta and Omega excited state spectra at three pion mass values, article, June 1, 2010; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc843264/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.