TY  - JOUR
AU  - BABAR Collaboration (del Amo Sanchez, P. et al
AU  - Lopez-March, N.
AU  - Martinez-Vidal, F.
AU  - Milanes, D. A.
AU  - Oyanguren, A.
PY  - 2010
DA  - 2010//
TI  - Measurement of the absolute branching fractions for D-s(-) -> l(-) (nu)over-bar(l) and extraction of the decay constant f(Ds)
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 091103
EP  - 8pp
VL  - 82
IS  - 9
PB  - Amer Physical Soc
AB  - The absolute branching fractions for the decays D-s(-) -> l(-) (nu) over bar (l) (l = e, mu, or tau) are measured using a data sample corresponding to an integrated luminosity of 521 fb(-1) collected at center-of-mass energies near 10.58 GeV with the BABAR detector at the PEP-II e(+)e(-) collider at SLAC. The number of D-s(-) mesons is determined by reconstructing the recoiling system DKX gamma in events of the type e(+)e(-) -> DKXDs*(-), where D-s*(-) -> D-s(-) gamma and X represents additional pions from fragmentation. The D-s(-) -> l(-) nu(l) events are detected by full or partial reconstruction of the recoiling system DKX gamma l. The branching fraction measurements are combined to determine the D-s(-) decay constant f(Ds) (258.6 +/- 6.4 +/- 7:5) MeV, where the first uncertainty is statistical and the second is systematic.
SN  - 1550-7998
UR  - http://arxiv.org/abs/1008.4080
UR  - https://doi.org/10.1103/PhysRevD.82.091103
DO  - 10.1103/PhysRevD.82.091103
LA  - English
N1  - ISI:000284049300001
ID  - BABARCollaborationdelAmoSanchez_etal2010
ER  -