Institute for Theoretical Particle Physics (TTP)

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preprints:2009:ttp09-12 [2016/03/17 11:03] (current)
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 +====== TTP09-12 Four-pion production in tau decays and e+e- annihilation: an update ====== 
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 +   <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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