Study of the decay tau- --> 2 pi- pi+ 3 pi0 tau-neutrino
Collaboration
10 pages
Published in:
- Phys.Rev.Lett. 79 (1997) 3814-3818
e-Print:
- hep-ex/9707027 [hep-ex]
PDG: 3
Report number:
- SLAC-PUB-9766,
- CLNS-97-1497,
- CLEO-97-16
Experiments:
- CESR-CLEO-II
Citations per year
Abstract:
The decay tau- -> 2pi- pi+ 3pi0 nu_tau has been studied with the CLEO II detector at the Cornell Electron Storage Ring (CESR). The branching fraction is measured to be (2.85 +/- 0.56 +/- 0.51) x 10^(-4). The result is in good agreement with the isospin expectation but somewhat below the Conserved-Vector-Current (CVC) prediction. We have searched for resonance substructure in the decay. Within the statistical precision, the decay is saturated by the channels tau- -> pi- 2pi0 omega nu_tau, 2pi- pi+ eta nu_tau, and pi- 2pi0 eta nu_tau. This is the first observation of this omega decay mode and the branching fraction is measured to be (1.89 +0.74/-0.67 +/- 0.40) x 10^(-4).Note:
- 10 pages, postscript file also available through http://w4.lns.cornell.edu/public/CLNS Report-no: CLNS 97/1497, CLEO 97-16
- electron positron: colliding beams
- electron positron: annihilation
- tau: pair production
- tau-: semileptonic decay
- tau-: branching ratio
- pi: multiple production
- isospin
- CVC model model
- mass spectrum: (pi+ 2pi- 3pi0)
- mass spectrum: (pi+ pi- pi0)
References(13)
Figures(0)