Journal article
Measurement of the absolute branching fractions for D-s(-) -> l(-) (nu)over-bar(l) and extraction of the decay constant f(Ds)
Physical review. D, Particles, fields, gravitation, and cosmology, Vol.82(9), 091103(R)
11/10/2010
DOI: 10.1103/PhysRevD.82.091103
Abstract
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.
Details
- Title: Subtitle
- Measurement of the absolute branching fractions for D-s(-) -> l(-) (nu)over-bar(l) and extraction of the decay constant f(Ds)
- Creators
- Neus López-MarchFernando Martínez-VidalDiego A Milanés - Universitat de ValènciaArantza Oyanguren - Universitat de ValènciaP. D SánchezJ. P Lees - University of SavoyBABAR Collaboration
- Contributors
- U Mallik (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Physical review. D, Particles, fields, gravitation, and cosmology, Vol.82(9), 091103(R)
- DOI
- 10.1103/PhysRevD.82.091103
- ISSN
- 1550-7998
- eISSN
- 1550-2368
- Publisher
- American Physical Society
- Language
- English
- Date published
- 11/10/2010
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199955302771
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