Measurement of the Pseudoscalar Decay Constant f{sub D{sub s}} Using Charm-Tagged Events in e{sup +}e{sup -} Collisions at {radical}(s)=10.58 GeV

Journal Article · Fri Apr 06 00:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.141801· OSTI ID:20951203

Aubert, B; Barate, R; Bona, M; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A ^[1]; Grauges, E ^[2]; Palano, A; Pappagallo, M ^[3]; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S ^[4]; Eigen, G; Ofte, I ^[5]

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1. Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux (France)
2. Facultat de Fisica, Departament ECM, Universitat de Barcelona, E-08028 Barcelona (Spain)
3. Dipartimento di Fisica and INFN, Universita di Bari, I-70126 Bari (Italy)
4. Institute of High Energy Physics, Beijing 100039 (China)
5. Institute of Physics, University of Bergen, N-5007 Bergen (Norway)

Using 230.2 fb{sup -1} of e{sup +}e{sup -} annihilation data collected with the BABAR detector at and near the peak of the {upsilon}(4S) resonance, 489{+-}55 events containing the pure leptonic decay D{sub s}{sup +}{yields}{mu}{sup +}{nu}{sub {mu}} have been isolated in charm-tagged events. The ratio of partial widths {gamma}(D{sub s}{sup +}{yields}{mu}{sup +}{nu}{sub {mu}})/{gamma}(D{sub s}{sup +}{yields}{phi}{pi}{sup +}) is measured to be 0.143{+-}0.018{+-}0.006 allowing a determination of the pseudoscalar decay constant f{sub D{sub s}}=(283{+-}17{+-}7{+-}14) MeV. The errors are statistical, systematic, and from the D{sub s}{sup +}{yields}{phi}{pi}{sup +} branching ratio, respectively.

• OSTI ID: 20951203
• Journal Information: Physical Review Letters, Vol. 98, Issue 14; Other Information: DOI: 10.1103/PhysRevLett.98.141801; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BRANCHING RATIO
D PLUS MESONS
ELECTRON-POSITRON COLLISIONS
ELECTRONS
ERRORS
GEV RANGE 10-100
LEPTONIC DECAY
MEV RANGE 100-1000
MUON NEUTRINOS
MUONS PLUS
PARTICLE WIDTHS
PHI MESONS
PIONS PLUS
POSITRONS
RESONANCE