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Measurement of the absolute branching fraction of Ds+ --> tau+ nutau decay.

Authors
  • Ecklund, K M
  • Love, W
  • Savinov, V
  • Lopez, A
  • Mendez, H
  • Ramirez, J
  • Ge, J Y
  • Miller, D H
  • Shipsey, I P J
  • Xin, B
  • Adams, G S
  • Anderson, M
  • Cummings, J P
  • Danko, I
  • Hu, D
  • Moziak, B
  • Napolitano, J
  • He, Q
  • Insler, J
  • Muramatsu, H
  • And 89 more
Type
Published Article
Journal
Physical review letters
Publication Date
Apr 25, 2008
Volume
100
Issue
16
Pages
161801–161801
Identifiers
PMID: 18518183
Source
Medline
License
Unknown

Abstract

Using a sample of tagged D(s)(+) decays collected near the D(s)(*+/-)D(s)(-/+) peak production energy in e(+)e(-) collisions with the CLEO-c detector, we study the leptonic decay D(s)(+)-->tau(+)nu(tau) via the decay channel tau(+)-->e(+)nu(e)nu(tau). We measure B(D(s)(+)-->tau(+)nu(tau))=(6.17+/-0.71+/-0.34)%, where the first error is statistical and the second systematic. Combining this result with our measurements of D(s)(+)-->mu(+)nu(mu) and D(s)(+)-->tau(+)nu(tau) (via tau(+)-->pi(+)nu(tau)), we determine f(D(s))=(274+/-10+/-5) MeV.

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