%0 Journal Article
%T Measurement of the absolute branching fractions for D-s(-) -> l(-) (nu)over-bar(l) and extraction of the decay constant f(Ds)
%A BABAR Collaboration (del Amo Sanchez, P. et al
%A Lopez-March, N.
%A Martinez-Vidal, F.
%A Milanes, D. A.
%A Oyanguren, A.
%J Physical Review D
%D 2010
%V 82
%N 9
%I Amer Physical Soc
%@ 1550-7998
%G English
%F BABARCollaborationdelAmoSanchez_etal2010
%O ISI:000284049300001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=330), last updated on Mon, 11 Apr 2011 13:11:12 +0000
%X 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.
%R 10.1103/PhysRevD.82.091103
%U http://arxiv.org/abs/1008.4080
%U https://doi.org/10.1103/PhysRevD.82.091103
%P 091103-8pp