Research Papers in Physics and Astronomy

 

Date of this Version

8-1-1998

Comments

Published by American Physical Society. Phys. Rev. D 58, 032002 (1998). http://prd.aps.org. Copyright © 1998 American Physical Society. Permission to use.

Abstract

We present a new determination of fDs using 5 million e+e-cc̅ events obtained with the CLEO II detector. Our value is derived from our new measured ratio Γ(Ds+ → μ+ν)/Γ(Ds+ → φ π +) = 0.173±0.023 ±0.035. Using Ɓ(Ds+ → φ π +) = (3.6±0.9)%, we extract fDs = (280±19±28±34) MeV. We compare this result with various model calculations.

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