We present a new determination of f(D)(s) using 5 million e(+)e(-)→cc¯ events obtained with the CLEO II detector. Our value is derived from our new measured ratio Γ(D(+)(s)→μ(+)ν)/Γ(D(+)s→φπ(+))=0.173±0.023±0.035. Using B(D(+)(s)→φπ(+))=(3.6±0.9)%, we extract f(D)(s)=(280±19±28±34) MeV. We compare this result with various model calculations.
This is the publisher's version also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.58.032002.
The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, gender identity, gender expression and genetic information in the University’s programs and activities. The following person has been designated to handle inquiries regarding the non-discrimination policies: Director of the Office of Institutional Opportunity and Access, IOA@ku.edu, 1246 W. Campus Road, Room 153A, Lawrence, KS, 66045, (785)864-6414, 711 TTY.