Measurement of the Absolute Branching Fraction of D{sub s}{sup +}{yields}{tau}{sup +}{nu}{sub {tau}} Decay
- State University of New York at Buffalo, Buffalo, New York 14260 (United States)
- University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)
- University of Puerto Rico, Mayaguez, Puerto Rico 00681 (United States)
- Purdue University, West Lafayette, Indiana 47907 (United States)
- Rensselaer Polytechnic Institute, Troy, New York 12180 (United States)
- University of Rochester, Rochester, New York 14627 (United States)
Using a sample of tagged D{sub s}{sup +} decays collected near the D{sub s}*{sup {+-}}D{sub s}{sup {+-}} peak production energy in e{sup +}e{sup -} collisions with the CLEO-c detector, we study the leptonic decay D{sub s}{sup +}{yields}{tau}{sup +}{nu}{sub {tau}} via the decay channel {tau}{sup +}{yields}e{sup +}{nu}{sub e}{nu}{sub {tau}}. We measure B(D{sub s}{sup +}{yields}{tau}{sup +}{nu}{sub {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{sub s}{sup +}{yields}{mu}{sup +}{nu}{sub {mu}} and D{sub s}{sup +}{yields}{tau}{sup +}{nu}{sub {tau}} (via {tau}{sup +}{yields}{pi}{sup +}{nu}{sub {tau}}), we determine f{sub D{sub s}}=(274{+-}10{+-}5) MeV.
- OSTI ID:
- 21128066
- Journal Information:
- Physical Review Letters, Vol. 100, Issue 16; Other Information: DOI: 10.1103/PhysRevLett.100.161801; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). CLEO Collaboration; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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