Measurements of σ(e+e- → hadrons) and B(ψ(3770) → D(D)over-bar, non-D(D)over-bar)

被引：0
|
作者：
Rong, G [1 ]
机构：
[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
来源：
HADRON SPECTROSCOPY | 2006年 / 814卷
关键词：
document processing; class file writing; LATEX; 2; epsilon;
D O I：
暂无
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Precision measurements of R values (R = sigma(B)(had)/sigma(B)(mu+mu-), where sigma(B)(had) and sigma(B)(mu+mu-) are Born order cross sections for inclusive hadron production and for muon pair production in e+e- annihilation, respectively.) at low energy region are important for precise test of the Standard Model [1]. On the other hand, the measurements of the R values at the center-of-mass energies around 3.6574 and at 3.773 GeV can be used to determine the branching fractions for psi(3770) -> D-0(D) over bar (0),D+D-,D (D) over bar), and for psi(3770) -> non-D (D) over bar. In this paper, we present a more precision measurement of the R values at the center-of-mass energies of 3.650, 3.6648 and 3.773 GeV, and measurements of the branching fractions for psi(3770) -> D-0,(D) over bar (0), D+D-, D (D) over bar, and for psi(3770) -> non-D (D) over bar with the data taken with the BES-II detector at the BEPC Collider.
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页码：414 / 420
页数：7
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