Nucleon, Delta and Omega excited state spectra at three pion mass values
Conference
·
· Proceedings of Science
OSTI ID:1022607
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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1022607
- Report Number(s):
- JLAB-THY-10-1224; DOE/OR/23177-1394; arXiv:1011.1509; TRN: US1104307
- Journal Information:
- Proceedings of Science, Vol. LATTICE2010; Conference: Lattice 2010, Villasimius, Sardinia, Italy, 14-19 Jun 2010.
- Country of Publication:
- United States
- Language:
- English
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