Published in:

Physical Review Letters 99,7 (2007)

Abstract

We measure the decay constant f(Ds)(+) using the D-s(+)-> l(+)nu channel, where the l(+) designates either a mu(+) or a tau(+), when the tau(+)->pi(+)(v) over bar. Using both measurements we find f(Ds)(+)= 274 +/- 13 +/- 7 MeV. Combining with our previous determination of f(D)(+), we compute the ratio f(Ds)(+)/f(D)(+)= 1.23 +/- 0.11 +/- 0.04. We compare with theoretical estimates.

Keywords

Physics, Multidisciplinary

Date of this Version

January 2007

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.