1997/12/11 by X. Song · 5 citations
Physics and Astronomy · #Bottom quark #Chiral symmetry breaking #Constituent quark #Coupling constant #Down quark #High-Energy Particle Collisions Research #Observable #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Quark model #Quarkonium #Spin (aerodynamics) #Symmetry breaking #Thermodynamics #Top quark #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.57.4114
published as Phys.Rev. D57 (1998) 4114-4123 · 20 pages, Revtex, 3 tables, 4 figures
arxiv created 1997/12/11 · openalex publication_date 1998/04/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
New relations between the quark spin-flavor contents of the nucleon and axial weak coupling constants are obtained in the chiral quark model with both SU(3)- and U(1)-breaking effects. Using the nonsinglet spin combinations \ensuremathΔ3 and \ensuremathΔ8, all spin-flavor observables are functions of only one parameter a---the probability for the chiral pionic fluctuation. The upper and lower bounds of these observables are given. The optimum range of a, determined by NMC data d\ensuremath-\ifmmode u\else \=u\fi, gives a constraint to the cutoff of the chiral quark field theory. The model predictions are in good agreement with the existing data in this range of a. The roles of the kaon, \ensuremathη and \ensuremathη^\ensuremath' are also discussed.