Measurement of the decay constant $f(D^+_S)$ using $D^+_{S} \to \ell^{+} \nu$ - INSPIRE

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Measurement of the decay constant $f(D^+_S)$ using $D^+_{S} \to \ell^{+} \nu$

CLEO

Collaboration

Apr, 2007

5 pages

Published in:

Phys.Rev.Lett. 99 (2007) 071802

e-Print:

0704.0629 [hep-ex]

DOI:

10.1103/PhysRevLett.99.071802

Report number:

CLNS-07-1989,
CLEO-07-1

Experiments:

CESR-CLEO-C

View in:

ADS Abstract Service

reference search94 citations

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Abstract: (APS)

We measure the decay constant fDs+ using the Ds+→ℓ+ν channel, where the ℓ+ designates either a μ+ or a τ+, when the τ+→π+ν¯. Using both measurements we find fDs+=274±13±7 MeV. Combining with our previous determination of fD+, we compute the ratio fDs+/fD+=1.23±0.11±0.04. We compare with theoretical estimates.

13.20.Fc
D mesons
heavy tau leptons
lattice field theory
lepton decay
meson leptonic decay
quantum chromodynamics
standard model
electron positron: colliding beams
electron positron: annihilation

References(24)

Figures(0)

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