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A Study of tau decays involving eta and omega mesons

Collaboration
Jul, 1996
22 pages
Published in:
  • Z.Phys.C 74 (1997) 263-273
DOI:
Report number:
  • CERN-PPE-96-103,
  • FSU-SCRI-97-50
Experiments:
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Abstract: (Springer)
The 132 pbt - 1 of data collected by ALEPH from 1991 to 1994 have been used to analyze η and ω production in τ decays. The following branching fractions have been measured: B(τ−→ντωh−)=(1.91±0.07±0.06)×10−2,B\left( {{\tau ^ - } \to {\nu _\tau }\omega {h^ - }} \right) = \left( {1.91 \pm 0.07 \pm 0.06} \right) \times {10^{ - 2}},B(τ−→ντωh−π0)=(4.3±0.6±0.5)×10−3,B\left( {{\tau ^ - } \to {\nu _\tau }\omega {h^ - }{\pi ^0}} \right) = \left( {4.3 \pm 0.6 \pm 0.5} \right) \times {10^{ - 3}},B(τ−→ντηK−)=(2.9−1.2+1.3±0.7)×10−4,B\left( {{\tau ^ - } \to {\nu _\tau }\eta {K^ - }} \right) = \left( {2.9_{ - 1.2}^{ + 1.3} \pm 0.7} \right) \times {10^{ - 4}},B(τ−→ντηh−π0)=(1.8±0.4±0.2)×10−3B\left( {{\tau ^ - } \to {\nu _\tau }\eta {h^ - }{\pi ^0}} \right) = \left( {1.8 \pm 0.4 \pm 0.2} \right) \times {10^{ - 3}} and the 95% C.L. limit B(τ− → ντηπt -) < 6.2 × 10t - 4 has been obtained. The ωπt- and ηπt -π0 rates and dynamics are found in agreement with the predictions made from e+e∼ - annihilation data with the help of isospin invariance (CVC).
  • electron positron: colliding beams
  • colliding beams: electron positron
  • electron positron: annihilation
  • annihilation: electron positron
  • Z0: electroproduction
  • electroproduction: Z0
  • tau: pair production
  • pair production: tau
  • tau-: semileptonic decay
  • semileptonic decay: tau-
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