2000/05/31 by H. Weigel
Physics and Astronomy · #BETA (programming language) #Baryon #Beta decay #Computer science #High-Energy Particle Collisions Research #Hyperon #Lambda #Lambda baryon #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Wave function #hep-ph #nucl-th
paper · pdf · doi:10.1016/s0375-9474(01)00347-5
published as Nucl.Phys. A690 (2001) 595 · 14 pages, minor revisions, paper accepted for publication in Nucl. Phys. A
arxiv created 2000/12/20 · openalex publication_date 2001/07/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Within the collective coordinate approach to chiral soliton models we suggest that breaking of SU(3) flavor symmetry mainly resides in the baryon wave-functions while the charge operators maintain a symmetric structure. Sizable symmetry breaking in the wave-functions is required to reproduce the observed spacing in the spectrum of the (1/2)+ baryons. The matrix elements of the flavor symmetric charge operators nevertheless yield gA/gV ratios for hyperon beta-decay which agree with the empirical data approximately as well as the successful F&D parameterization of the Cabibbo scheme. Demanding the strangeness component in the nucleon to vanish in the two flavor limit of the model, determines the structure of the singlet axial charge operator and yields the various quark flavor components of the axial charge of the Λ-hyperon. The suggested picture gains support from calculations in a realistic model using pion and vector meson degrees of freedom to build up the soliton.