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

  • E. van Beveren
  • G. Rupp
Theoretical physics

Abstract.

A general expression resembling the Breit–Wigner formula is derived for the description of resonances which appear in meson–meson scattering. Our 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 \(^3P_0\) valence-quark-pair creation for OZI-allowed hadronic decay, and not to the central positions and widths of resonances. This method also provides us with a straightforward explanation for the origin of the light scalar mesons without requiring extra degrees of freedom.

Keywords

General Expression Simple Form Central Position Specific Assumption Scalar Meson 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2001

Authors and Affiliations

  • E. van Beveren
    • 1
  • G. Rupp
    • 2
  1. 1.Centro de Física Teórica, Departamento de Física, Universidade de Coimbra, 3000 Coimbra, PortugalPT
  2. 2.Centro de Física das Interacçoes Fundamentais, Instituto Superior Técnico, Edifício Ciência, 1049-001 Lisboa Codex, PortugalPT

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