通讯机构：
[Liu, Xin] J;Jiangsu Normal Univ, Sch Phys & Elect Engn, Xuzhou 221116, Jiangsu, Peoples R China.
摘要：
We formulate the most general time-dependent distributions of Bs→J/ψ(→l+l−)ϕ(→K+K−) in which the direct charge parity ( CP) violation is explicitly incorporated. We investigate the B→J/ψV decays in the perturbative QCD approach where V is a light vector meson. Apart from the leading-order factorizable contributions, we also take into account QCD vertex corrections and the hard-spectator diagrams. With the inclusion of these sizable corrections, most of our theoretical results for CP-averaged branching ratios, polarization fractions, CP-violating asymmetries, and relative phases are consistent with the available data. Based on the global agreement, we further explore the penguin contributions and point out that the ϕs extracted from Bs→J/ψϕ can be shifted away by O(10−3).
期刊：
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2001年25(6):465-475 ISSN：0254-3052
通讯作者：
Rong, G
作者机构：
[Rong, G] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.;Univ Sci & Technol China, Dept Modern Phys, Anhua 230026, Peoples R China.;Shandong Univ, Dept Phys, Jinan 250100, Peoples R China.;Hangzhou Univ, Dept Phys, Hangzhou 310028, Peoples R China.;Shanghai Jiao Tong Univ, Dept Appl Phys, Shanghai 200030, Peoples R China.
通讯机构：
[Rong, G] C;Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China.
关键词：
Beijing Electron Positron Collider (BEPC);Beijing Spectrometer (BES);D-s(+) Meson;D-s(+) single tag;branching fraction;production cross section;radiative correction
摘要：
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 reported in the paper. The cross section for the D: DI production has been measured 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 94 +/- 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 +/- 118)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 determined to be (3.02 +/- 0.94 +/- 0.91)% and (3.28 +/- 1.22 +/- 0.94)%, respectively.
