DIRECT MEASUREMENT OF THE D-3 BRANCHING FRACTION TO PHI-PI

Citation
Jz. Bai et al., DIRECT MEASUREMENT OF THE D-3 BRANCHING FRACTION TO PHI-PI, Physical review. D. Particles and fields, 52(7), 1995, pp. 3781-3784
Citations number
13
Categorie Soggetti
Physics, Particles & Fields
ISSN journal
05562821
Volume
52
Issue
7
Year of publication
1995
Pages
3781 - 3784
Database
ISI
SICI code
0556-2821(1995)52:7<3781:DMOTDB>2.0.ZU;2-N
Abstract
The Beijing Spectrometer (BES) Collaboration has observed exclusive pa ir production of D-s mesons at the Beijing Electron-Positron Collider (BEPC) at a center-of-mass energy of 4.03 GeV. The D-s mesons are dete cted in the phi pi(+), (K) over barK-0(+), and (K) over bar(0)K(+) de cay modes; two fully reconstructed events yield the value (3.9 (-1.9 - 1.1) (+5.1 +1.8))% for the D-s branching fraction to phi pi. This is t he first direct, model-independent measurement of this quantity.