A global treatment of VMD physics up to the φ; I: e+e‑ annihilations, anomalies and vector meson partial widths
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‑→π0γ, e+e‑→ηγ and e+e‑→π0π+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(V→f1)Γ(V→e+e‑) and ratios of the form Γ(V→f1)/Γ(V→f2) describing decays of vector mesons to several non-leptonic final states.
- Publication:
-
European Physical Journal C
- Pub Date:
- January 2010
- DOI:
- 10.1140/epjc/s10052-009-1197-6
- arXiv:
- arXiv:0907.4047
- Bibcode:
- 2010EPJC...65..211B
- Keywords:
-
- Vector Meson;
- Partial Width;
- Data Column;
- Isospin Breaking;
- Hide Local Symmetry;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- 58 pages, 10 figures Corrected a few misprints. Footnote 10 changed