Octet-baryon form factors in the diquark model
نویسندگان
چکیده
منابع مشابه
Octet-baryon Form Factors in the Diquark
We present an alternative parameterization of the quark-diquark model of baryons which particularly takes care of the most recent proton electric form-factor data from the E136 experiment at SLAC. In addition to electromagnetic form factors of the nucleon, for which good agreement with data is achieved, we discuss the weak axial vector form factor of the nucleon as well as electromagnetic form ...
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Nucleon form factors are calculated in a relativistic diquark–quark picture based on the Nambu–Jona-Lasinio model. The nucleon wave function is obtained in a static approximation to the quark exchange interaction between the valence quark and the diquark. We evaluate the valence quark and 0–diquark contribution to the nucleon electromagnetic and weak currents. We find reasonable electric charge...
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The weak vector and axial-vector form factors have been investigated for the semi-leptonic octet baryon decays in the chiral constituent quark model with configuration mixing (χCQMconfig). The effects of SU(3) symmetry breaking and configuration mixing have also been investigated and the results are not only in good agreement with existing experimental data but also show improvement over other ...
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We study the weak vector and axial-vector form factors of firstand second-class currents for the semileptonic octet baryon decays in the spirit of the chiral quark model. Our results for the weak magnetism form factors are consistent with the conserved vector current (CVC) results. The induced pseudotensor form factors, which are highly model dependent, are small. The overall performance of the...
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The nucleon is described as a bound state of a quark and an extended diquark. Hereby the notion “diquark” refers to the modelling of separable correlations in the two–quark Green’s functions. Binding of quarks and diquarks takes place via an exchange interaction and is therefore related to the Pauli principle for three– quark states. Fully Poincaré covariant nucleon amplitudes are calculated fo...
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ژورنال
عنوان ژورنال: Zeitschrift f�r Physik A: Hadrons and Nuclei
سال: 1993
ISSN: 0939-7922,1434-601X
DOI: 10.1007/bf01284677