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Measurement of the absolute branching fraction of Ds+→τ+ντ decay
Measurement of the absolute branching fraction of Ds+→τ+ντ decay
- Source :
- Physical Review Letters. 100(16)
- Publication Year :
- 2008
-
Abstract
- Using a sample of tagged Ds+ decays collected near the Ds*±Ds peak production energy in e+e- collisions with the CLEO-c detector, we study the leptonic decay Ds+→τ+ντ via the decay channel τ+→e+νeν̄τ. We measure B(Ds+→τ+ντ)=(6. 17±0.71±0.34)%, where the first error is statistical and the second systematic. Combining this result with our measurements of Ds+→μ+νμ and Ds+→τ+ντ (via τ+→π+ν ̄τ), we determine fDs=(274±10±5)MeV. © 2008 The American Physical Society.
Details
- Language :
- English
- ISSN :
- 10797114 and 00319007
- Volume :
- 100
- Issue :
- 16
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.od......1064..ffb83b64ed382a05407323f7a8d2d5d6