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A global treatment of VMD physics up to the φ; I: e + e  annihilations, anomalies and vector meson partial widths

  • M. BenayounEmail author
  • P. David
  • L. DelBuono
  • O. Leitner
Regular Article - Theoretical Physics

Abstract

The HLS Model, equipped with a mechanism providing the breaking of U(3)/SU(3) symmetry and an isospin symmetry breaking leading naturally to vector meson mixing, has been recently shown to successfully account for the e + e π + π cross section and for the dipion spectrum in τ decay. The present study shows that the full anomalous sector of the HLS model can be considered and is validated by the experimental data. Indeed, this extended model provides a successful simultaneous fit to the e + e π + π data together with the available data on the e + e π 0 γ, e + e η γ and e + e π 0 π + π cross sections. It is shown that the fit of these data sets also predicts an accurate description of the η/η π + π γ decays fully consistent with the reported information on their branching fractions and spectra. Finally, one also derives from our global fits products of widths of the form Γ(Vf 1)Γ(Ve + e ) and ratios of the form Γ(Vf 1)/Γ(Vf 2) describing decays of vector mesons to several non-leptonic final states.

Keywords

Vector Meson Partial Width Data Column Isospin Breaking Hide Local Symmetry 
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 / Società Italiana di Fisica 2009

Authors and Affiliations

  • M. Benayoun
    • 1
    Email author
  • P. David
    • 1
  • L. DelBuono
    • 1
  • O. Leitner
    • 1
  1. 1.LPNHE Paris VI/VII, IN2P3/CNRSParisFrance

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