Four-pion production in tau decays and e+e- annihilation: an update
High Energy Physics - Phenomenology
2008-11-26 v2 High Energy Physics - Experiment
Abstract
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.
Keywords
Cite
@article{arxiv.0804.0359,
title = {Four-pion production in tau decays and e+e- annihilation: an update},
author = {Henryk Czyz and Johann H. Kuhn and Agnieszka Wapienik},
journal= {arXiv preprint arXiv:0804.0359},
year = {2008}
}
Comments
a few typos corrected