Modified Breit-Wigner formula for mesonic resonances describing OZI decays of confined qq̄ states and the light scalar mesons
نویسندگان
چکیده
A general expression resembling Breit-Wigner formulae is derived for the description of resonances which appear in meson-meson scattering. Starting point is a unitarised meson model, but reduced to a simpler form and freed from the specific assumption about the confining force. The parameters of the resulting “Resonance-Spectrum Expansion” are directly related to the confinement spectrum and the mechanism of P0 valence-quark-pair creation for OZI-allowed hadronic decay, and not to the central positions and widths of resonances. The method also provides a straightforward explanation for the origin of the light scalar mesons without requiring extra degrees of freedom.
منابع مشابه
Reconciling the Light Scalar Mesons with Breit-Wigner Resonances as well as the Quark Model
Resonances appearing in hadronic scattering processes are described by a two-phase model. In the one phase, scattering products are observed, whereas the other phase describes confinement. A so-called “Resonance-Spectrum Expansion” is derived, containing expressions that resemble Breit-Wigner formulae. This method also provides a straightforward explanation for the origin of the light scalar me...
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