A Global Treatment Of VMD Physics Up To The phi: I. e+ e- Annihilations, Anomalies And Vector Meson Partial Widths
2009
60 pages
Published in:
- Eur.Phys.J.C 65 (2010) 211-245
e-Print:
- 0907.4047 [hep-ph]
Report number:
- LPNHE-2009-05
View in:
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Abstract: (arXiv)
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 e^+ e^- \ra \pi^+\pi^- cross section and for the dipion spectrum in 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^- \ra \pi^+\pi^- data together with the available data on e^+ e^- \ra \pi^0\gamma, e^+ e^- \ra \eta\gamma and e^+ e^- \ra \pi^0 \pi^+\pi^- cross sections. It is shown that the fit of these data sets also predicts an accurate description of the \eta/\eta^\prime \ra \pi^+ \pi^- \gamma 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 \Gamma (V \ra f_1)\Gamma(V \ra e^+ e^-) and ratios of the form \Gamma (V \ra f_1)/\Gamma (V \ra f_2) describing decays of vector mesons to several non--leptonic final states.- electron positron: annihilation
- vector meson: mixing
- isospin: symmetry breaking
- pi+: pair production
- tau: decay
- vector meson: form factor
- hidden symmetry: local
- effective Lagrangian
- vector dominance
- Wess-Zumino-Witten model
References(61)
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