Lattice QCD and nucleon resonances
Lattice calculations provide an ab initio means for the study of QCD. Recent progress at understanding the spectrum and structure of nucleons from lattice QCD studies is reviewed. Measurements of the masses of the lightest particles for the lowest spin values are described and related to predictions of quark model. The determination of the masses of the higher masses is described, and in particular the mass of the Roper resonance, using Bayesian statistics. The need to perform calculations at realistically light values of the pion mass is emphasized, and the exciting progress at attaining such masses is outlined. The talk concludes with future prospects, emphasizing the importance of constructing a basis of interpolating operators that is sensitive both the three-quark and to multi-quark and excited glue.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 824873
- Report Number(s):
- JLAB-THY-03-165; DOE/ER/40150-2735
- Country of Publication:
- United States
- Language:
- English
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