Improved measurement of the pseudoscalar decay constant f(D(s))

Chadha, M.; Chan, S.; Eigen, G.; Miller, J.S.; O'Grady, C.; Schmidtler, M.; Urheim, J.; Weinstein, A.J.; Wuerthwein, Frank K.; Bliss, D.W.

doi:10.1103/PhysRevD.58.032002

Improved measurement of the pseudoscalar decay constant f(D(s))

CLEO

Collaboration

•

M. Chadha
(
- Caltech
)

Dec, 1997

23 pages

Published in:

Phys.Rev.D 58 (1998) 032002

e-Print:

hep-ex/9712014 [hep-ex]

DOI:

10.1103/PhysRevD.58.032002

PDG:

{{\mathit D}_{{{s}}}^{+}}

\rightarrow

{{\mathit \phi}}{{\mathit \pi}^{+}}

Report number:

SLAC-PUB-9755,
CLNS-97-1526,
CLEO-97-28

Experiments:

CESR-CLEO-II

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Abstract:

We present a new determination of the Ds decay constant, f_{Ds} using 5 million continuum charm events obtained with the CLEO II detector. Our value is derived from our new measured ratio of widths for Ds -> mu nu/Ds -> phi pi of 0.173+/- 0.021 +/- 0.031. Taking the branching ratio for Ds -> phi pi as (3.6 +/- 0.9)% from the PDG, we extract f_{Ds} = (280 +/- 17 +/- 25 +/- 34){MeV}. We compare this result with various model calculations.

electron positron: colliding beams
electron positron: annihilation
quark: charm
quark: pair production
yield: (D/s*(2110) D/s+)
D/s+: hadronic decay
D/s+: leptonic decay
D/s+: branching ratio
D/s: decay constant
CLEO

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