Measurement of {B(D s+ → μ +ν μ) }/{B(D s+ → φμ +ν μ) } and determination of the decay constant fDs
Abstract
We have observed 23.2 ± 6.0 -0.9+1.0 purely-leptonic decays of Ds+ → μ+νμ from a sample of muonic one prong decay events detected in the emulsion target of Fermilab experiment E653. Using the Ds+ → φμ+νμ yield measured previously in this experiment, we obtain {B(D s+ → μ +ν μ) }/{B(D s+ → φμ +ν μ) } = 0.16 ± 0.06 ± 0.03 . In addition, we extract the decay constant fDs = 194 ± 35 ± 20 ± 14 MeV.
- Publication:
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Physics Letters B
- Pub Date:
- February 1996
- DOI:
- 10.1016/0370-2693(96)00792-7
- arXiv:
- arXiv:hep-ex/9606017
- Bibcode:
- 1996PhLB..382..299K
- Keywords:
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- High Energy Physics - Experiment
- E-Print:
- 15 pages including one figure