Measurement of production cross section of Ds+Ds- in e(+)e(-) annihilationat the center-of-mass energy of root s=4.03GeV

Citation
Jz. Bai et al., Measurement of production cross section of Ds+Ds- in e(+)e(-) annihilationat the center-of-mass energy of root s=4.03GeV, HIGH EN P N, 25(6), 2001, pp. 465-475
Citations number
11
Language
CHINESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
ISSN journal
0254-3052 → ACNP
Volume
25
Issue
6
Year of publication
2001
Pages
465 - 475
Database
ISI
SICI code
0254-3052(200106)25:6<465:MOPCSO>2.0.ZU;2-R
Abstract
Measurement of the production cross section of the D-s(+) D-s(-) in e(+) e( -) annihilation at the Center-of-Mass Energy of roots = 4.03 GeV is reporte d in the paper. The cross section for the D: DI production has been measure d using a data sample of 22.3 pb(-1) collected with BES detector at BEPC e( +) e(-) collider. The D-s(+) measons are reconstructed in the phi pi (+), ( K*(0)) over barK(+) and (K-0) over barK(+) decay modes. A total number of 9 4 +/- 13 singly tagged D-s(+) events is obtained from the three modes. This yelds the cross section value sigmaD(s)(prod+)D(s)(-) = (451 +/- 63 +/- 11 8)pb for D-s(+) D-s(-) production. Based on the numbers of singly tagged D- s(+) events for each of the three decay modes,the decay branching fractions for D-s(+) --> (K*(0)) over barK(+) and (K-0) over barK(+) have been deter mined to be (3.02 +/- 0.94 +/- 0.91)% and (3.28 +/- 1.22 +/- 0.94)%, respec tively.