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Measurement of the pseudoscalar decay constant fDs using charm-tagged events in e+e- collisions at √s=10.58 GeV

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BABAR Collaboration (Including:

Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J. P., Poireau, V., Tisserand, V., Zghiche, A. et al.
). (2007) Measurement of the pseudoscalar decay constant fDs using charm-tagged events in e+e- collisions at √s=10.58 GeV. Physical Review Letters, Vol.98 (No.14). Article: 141801. ISSN 0031-9007

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Abstract

Using 230.2 fb(-1) of e(+)e(-) annihilation data collected with the BABAR detector at and near the peak of the Upsilon(4S) resonance, 489 +/- 55 events containing the pure leptonic decay D-s(+)->mu(+)nu(mu) have been isolated in charm-tagged events. The ratio of partial widths Gamma(D-s(+)->mu(+)nu(mu))/Gamma(D-s(+)->phi pi(+)) is measured to be 0.143 +/- 0.018 +/- 0.006 allowing a determination of the pseudoscalar decay constant f(Ds)=(283 +/- 17 +/- 7 +/- 14) MeV. The errors are statistical, systematic, and from the D-s(+)->phi pi(+) branching ratio, respectively.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Date: 6 April 2007
Volume: Vol.98
Number: No.14
Number of Pages: 7
Page Range: Article: 141801
Identification Number: 10.1103/PhysRevLett.98.141801
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
URI: http://wrap.warwick.ac.uk/id/eprint/32120

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