F/D Ratios in Hyperon Beta Decays and Spin Distribution in the Nucleon

Abstract

It is shown that hyperon beta decay data can be well accommodated within the framework of Cabbibo's SU(3) symmetric description if one allows for a small SU(3) symmetry breaking proportional to the mass difference between strange and nonstrange quarks. The F/D ratio does not depend sensitively on the exact form of the symmetry-breaking, and the best fits are close to the value previously used in the analysis of deep inelastic scattering of electrons or muons on polarized nucleons. The total quark helicity and strange quark polarization in the nucleon are discussed.

16 pages, 3 eps figures, use epsfig.sty

References in corpus (14)

• The theory and phenomenology of polarized deep inelastic scattering
• Measurement of the Spin-Dependent Structure Function $g_1(x)$ of the Proton
• Consistent Analysis of the Spin Content of the Nucleon
• Measurements of the Proton and Deuteron Spin Structure Function g2 and Asymmetry A2
• Analysis of Data on Polarized Lepton-Nucleon Scattering
• Spin Asymmetry in Muon--Proton Deep Inelastic Scattering on a Transversely-Polarized Target
• The next-to-leading QCD approximation to the Ellis-Jaffe sum rule
• QCD Sum Rule Calculation of Twist-3 Contributions to Polarized Nucleon Structure Functions
• QCD Sum Rule Calculation of Twist-4 Corrections to Bjorken and Ellis-Jaffe Sum Rules
• SU(3) Breaking Effects in Hyperon Semi-Leptonic Decays and the extraction of F and D
• Spin Contents of Nucleons with SU(3) Breaking
• Improved QCD sum rule estimates of the higher twist contributions to polarised and unpolarised nucleon structure functions
• Reanalysis of hyperon beta decay data on $F/D$
• How to Use Weak Decays in Analyses of Data on Nucleon Spin Structure Functions

Cited by in corpus (12)

• The antinucleon-nucleon interaction at low energy : annihilation dynamics
• Eta Meson Production in NN Collisions
• Semileptonic decays of the light J(P)=1/2(+) ground state baryon octet
• Nucleon spin-flavor structure in SU(3) breaking chiral quark model
• Chiral Quark Model with Configuration Mixing
• Hyperon Semileptonic decay constants with flavor SU(3) symmetry breaking
• New Relations and Constraints on Quark Spin-flavor Contents in Symmetry-breaking Chiral Quark Model
• F and D Values with Explicit Flavor Symmetry Breaking and Δs Contents of Nucleons
• SU(4) Chiral Quark Model with Configuration Mixing
• Test of SU(3) Symmetry in Hyperon Semileptonic Decays
• Chiral corrections to the vector and axial couplings of quarks and baryons
• Is there a mass dependence in the spin structure of baryons?