Pauli-corrected Breit-Wigner formulae for compound resonances in two- and three-cluster systems

Orlowski, M. C. L.

doi:10.1007/bf02786217

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2001

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“…Formula ( 14) has similar features as standard Breit-Wigner approximations [19,20,21,22,23,24,25,26] for resonant phenomena. However, from the values of E nℓc and B nℓc , one cannot read off the positions of the singularities.…”

Section: One Thresholdmentioning

confidence: 93%

Modified Breit–Wigner formula for mesonic resonances describing OZI decays of confined $q\bar{q}$ states and the light scalar mesons

Beveren

Rupp

2001

Eur. Phys. J. C

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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 3 P 0 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.

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