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A minimal dynamical scheme for ''understanding'' hadronic widths
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DOI：10.1002/prop.2190450504.png)
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Using a quark model scheme of 'least Dynamics an inclusive determination of the total widths of mesons and baryons is proposed via the following mechanism: There exists a short (breathing) mode for the temporary dissociation of a hadron into a pair of ''qausi-free'' quarks and/or diquarks which eventually hadronize with certainty, so that the requisite widths correspond to this ''first stage'' dissociation itself. A detailed model (described elsewhere) based on the momentum dependence of the quark's mass function nz(p) suggests a significant mass reduction of these quasi-free quarks w.r.t. their ''constituent'' values In(0). Using this logic, a phenomenological coupling scheme for the meson-(quasi-free)quark-vertex function is derived from Schwinger's Partial (broken chiral). Symmetry which incorporates the conservation of isospin. baryonic charge and hypercharge with respective 'gauge mesons rho, omega, phi. A very similar structure is found for baryon couplings to quark (q)-diquark (D) pairs, with the same overall coupling constant (g(s)) for both systems. Its tentative identification with the QCD value yields a surprisingly good pattern of agreement with data for both hadron types, using two ''quasi-free'' masses (m(ud) and m(s)) as inputs, with the corresponding diquark masses determined additively.
Keyword:
BARYON SPECTRA
QUARK-MODEL
MASSES
MESONS
期刊
F
IF:
7.8
论文数:
2.0K
被引数:
3.6K
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