====== TTP96-48 Isospin Violation in tau -> 3 pi nu_tau ======
 
 
   <hidden TTP96-48  Isospin Violation in tau -> 3 pi nu_tau > Isospin violating signals in the tau -> 3 pi nu_tau decay mode are
 discussed. For the tau -> pi^- pi^- pi^+ nu_tau decay mode, isospin
 violation arises from the vector current contribution in the 
 tau -> omega pi nu_tau decay with the subsequent isospin violating omega
 decay into pi^+ pi^-. We demonstrate that such effects may be observed in
 presently available data through the measurement of the interference
 effects of these vector current contributions with the dominating axial
 vector current, i.e.  through a measurement of the structure functions
 W_F,W_G,W_H and W_I. In the case of the tau -> pi^0 pi^0 pi^- nu_tau decay
 mode, a vector current contribution is generated by eta pi mixing in the
 decay chain tau -> eta rho nu_tau -> pi^0 pi^0 pi^- nu_tau. We find that
 this effect is rather small, the magnitude of the associated interference
 terms being too low for present statistics.
 
 </hidden>
|**Erwin Mirkes and Res Urech**  | 
|** Eur. Phys. J. C1 201-209 1998  **  |
| {{preprints:1996:ttp96-48.pdf|PDF}} {{preprints:1996:ttp96-48.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9702382|arXiv]]   |
| |