Proton spin and baryon octet axial couplings View Full Text


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Article Info

DATE

1993-03

AUTHORS

V. R. Zoller

ABSTRACT

Peripheral spin structure of the nucleon generated by the soft mesonic radiative corrections is studied within the light-cone perturbation theory. Starting with the tree-levelSU (6) symmetry, we find good description of the axial-vector couplings in β-decay of hyperons. We study the proton helicity flow from the baryonic core to the angular momentum of the pionic cloud. It is found that in the relativistic light-cone approach the spin-flip pattern is different from that in the conventional nonrelativistic models. The axial-vector current matrix elements are shown to receive large corrections from beyond the conventional static limit. The important virtue of using the light-cone vertex functions of the meson-baryon Fock components of the proton is that the local gauge invariance and the energy-momentum sum rule are satisfied automatically. We infer the radius of the light-cone form factor from an analysis of the experimental data on the fragmentation of high-energy protons into nucleons and hyperons-the process dominated by stripping off the mesons of the meson-baryon Fock states. More... »

PAGES

141-152

References to SciGraph publications

  • 1982-12. Measurements of hyperon semileptonic decays at the CERN Super Proton Synchrotron in ZEITSCHRIFT FÜR PHYSIK C PARTICLES AND FIELDS
  • 1989-12. Topological pomeron andA-universality in ZEITSCHRIFT FÜR PHYSIK C PARTICLES AND FIELDS
  • 1992-09. Peripheral structure of nucleons when probing with highQ2 photons in ZEITSCHRIFT FÜR PHYSIK C PARTICLES AND FIELDS
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    http://scigraph.springernature.com/pub.10.1007/bf01650440

    DOI

    http://dx.doi.org/10.1007/bf01650440

    DIMENSIONS

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