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  • 1
    Electronic Resource
    Electronic Resource
    Hadronic decays of N and Δ resonances in a chiral quark model (2001)
    Springer
    The European physical journal 12 (2001), S. 91-101 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 12.39.Pn Potential models – 13.30.Eg Hadronic decays – 14.20.Gk Baryon resonances with S = 0
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. π and η decay modes of light baryon resonances are investigated within a chiral quark model whose hyperfine interaction is based on Goldstone-boson exchange. For the decay mechanism a modified version of the 3 P 0 model is employed. Our primary aim is to provide a further test of the recently proposed Goldstone-boson exchange constituent quark model. We compare the predictions for π and η decay widths with experiment and also with results from a traditional one-gluon exchange constituent quark model. The differences between nonrelativistic and semirelativistic versions of the constituent quark models are outlined. We also discuss the sensitivity of the results on the parameterization of the meson wave function entering the 3 P 0 model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500170042
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  • 2
    Electronic Resource
    Electronic Resource
    Covariant electroweak nucleon form factors in a chiral constituent-quark model (2002)
    Springer
    The European physical journal 14 (2002), S. 17-21 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 12.39.-x Phenomenological quark models – 13.10.+q Weak and electromagnetic interactions of leptons – 14.20.Dh Protons and neutrons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Results for the proton and neutron electric and magnetic form factors as well as the nucleon axial and induced pseudoscalar form factors are presented for the chiral constituent-quark model based on Goldstone-boson exchange dynamics. The calculations are performed in a covariant framework using the point-form approach to relativistic quantum mechanics. The direct predictions of the model yield a remarkably consistent picture of the electroweak nucleon structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epja/iepja1403
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Nucleon magnetic moments in an extended chiral constituent quark model (2000)
    Springer
    The European physical journal 8 (2000), S. 385-388 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 12.39.-x Phenomenological quark models – 13.40.Em Electric and magnetic moments – 14.20.Dh Protons and neutrons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: We present results for the nucleon magnetic moments in the context of an extended chiral constituent quark model based on the mechanism of the Goldstone boson exchange, as suggested by the spontaneous breaking of chiral symmetry in QCD. The electromagnetic charge-current operator is consistently deduced from the model Hamiltonian, which includes all force components for the pseudoscalar, vector and scalar meson exchanges. Thus, the continuity equation is satisfied for each piece of the interaction, avoiding the introduction of any further parameter. A good agreement with experimental values is found. The role of isoscalar two-body operators, not constrained by the continuity equation, is also investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530050048
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    Paper (German National Licenses)
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