2002/03/19 by Frank X. Lee, Frank Lee, Xinyu Liu · 2 citations
Mathematics · Physics and Astronomy · #Baryon #Excited state #High-Energy Particle Collisions Research #Mathematics #Monte Carlo method #Nuclear physics #Octet #Parity (physics) #Particle physics #Particle physics theoretical and experimental studies #Physics #QCD sum rules #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Statistical physics #Statistics #Sum rule in quantum mechanics #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.66.014014
published as Phys.Rev.D66:014014,2002 · 33 pages, 2 figures
arxiv created 2002/03/19 · openalex publication_date 2002/07/30 · arxiv updated 2014/11/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The masses of octet baryons are calculated by the method of QCD sum rules. Using generalized interpolating fields, three independent sets of QCD sum rules are derived which allow the extraction of low-lying N* states with spin-parity 1/2+, 1/2- and 3/2- in both the non-strange and strange channels. The predictive ability of the sum rules is examined by a Monte Carlo based analysis procedure in which the three phenomenological parameters (mass, coupling, threshold) are treated as free parameters simultaneously. Realistic uncertainties in these parameters are obtained by simultaneously exploring all uncertainties in the QCD input parameters. Those sum rules with good predictive power are identified and their predictions are compared with experiment where available.