Reanalysis of hyperon beta decay data on $F/D$

Abstract

We reanalyse hyperon beta decay data to extract the corresponding F and D values. We show that flavour symmetry breaking effects lead naturally to a reduction of the $F/D$ ratio. For proton and neutron our analyses suggests $F/D=0.49\pm 0.08$ instead of $F/D=0.575\pm 0.016$ which is generally used to analyse the spin data. Our smaller $F/D$ value allows to fullfil the Ellis--Jaffe sum rule implying an unpolarized $s\bar{s}$-sea.

6 pages, latex, uses epsf.sty, 1 figure

References in corpus (8)

• The three-loop QCD $\beta$-function and anomalous dimensions
• Measurement of the Spin-Dependent Structure Function $g_1(x)$ of the Proton
• Consistent Analysis of the Spin Content of the Nucleon
• ERRATUM TO: Power corrections $1/Q^2$ to parton sum rules for deep inelastic scattering from polarized targets
• QCD Sum Rule Calculation of Twist-3 Contributions to Polarized Nucleon Structure Functions
• OPE analysis for polarized deep inelastic scattering
• How to Use Weak Decays in Analyses of Data on Nucleon Spin Structure Functions
• A model for the $Q^2$ dependence of polarized structure functions

Cited by in corpus (26)

• Measurements of the Proton and Deuteron Spin Structure Functions g1 and g2
• The Quark/Antiquark Asymmetry of the Nucleon Sea
• Determination of the Bjorken Sum and Strong Coupling from Polarized Structure Functions
• A Next-to-Leading Determination of the Singlet Axial Charge and the Polarized Gluon Content of the Nucleon
• SU(3) symmetry breaking in hyperon semileptonic decays
• Flavor Symmetry Breaking in the 1/N Expansion
• Unquenched quark model for baryons: magnetic moments, spins and orbital angular momenta
• SU(3) Breaking in Neutral Current Axial Matrix Elements and the Spin Content of the Nucleon
• Chiral Quark Model of Nucleon Spin-Flavor Structure with SU(3) and Axial-U(1) Breakings
• SU(3) Breaking Effects in Hyperon Semi-Leptonic Decays and the extraction of F and D
• Polarized parton distributions from charged-current deep-inelastic scattering and future neutrino factories
• SU(3) Breaking in Hyperon Beta Decays: a Prediction for Xi^0 -> Sigma^+ e nu-bar
• F and D Values with Explicit Flavor Symmetry Breaking and Δs Contents of Nucleons
• A lattice study of the spin structure of the Lambda hyperon
• Hyperon semileptonic decays and quark spin content of the proton
• Semileptonic decay constants of octet baryons in the chiral quark-soliton model
• Spin Transfers for Baryon Production in Polarized pp Collisions at RHIC-BNL
• F/D Ratios in Hyperon Beta Decays and Spin Distribution in the Nucleon
• A model for the $Q^2$ dependence of polarized structure functions
• Chiral corrections to the vector and axial couplings of quarks and baryons
• What We Can Learn About Nucleon Spin Structure From Recent Data
• Strange Mass Corrections to Hyperonic Semi-leptonic Decay in Statistical Model
• The Proton Spin and Flavor Structure in the Chiral Quark Model
• Is there a mass dependence in the spin structure of baryons?
• An Alternative Method to Obtain the Quark Polarization of the Nucleon
• Axial Vector Coupling Constant in Chiral Colour Dielectric Model