====== TTP09-12 Four-pion production in tau decays and e+e- annihilation: an update ======
 
 
   <hidden TTP09-12  Four-pion production in tau decays and e+e- annihilation: an update > An improved description of four-pion production in electron-positron annihilation and in tau lepton decays is presented. The model amplitude is fitted to recent data from BaBar which cover a wide energy range and which were obtained exploiting the radiative return. Predicting tau decay distributions from e+e- data and comparing these predictions with ALEPH and CLEO results, the validity of isospin symmetry is confirmed within the present experimental errors. A good description of two- and three-pion sub-distributions is obtained. Special emphasis is put on the predictions for omega pi (-> pi+pi-pi0) in e+e- annihilation and in tau decay. The model amplitude is implemented in the Monte Carlo generator PHOKHARA.
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|**Henryk Czyz, Johann H. Kuhn, Agnieszka Wapienik**  | 
|**  Phys.Rev.  D77 114005 2008  **  |
| {{preprints:2009:ttp09-12.pdf|PDF}} {{preprints:2009:ttp09-12.ps|PostScript}} [[http://arxiv.org/abs/0804.0359|arXiv]]   |
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