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arXiv 0807.1220hep-ex
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CLEO的R测量

The measurement of R at CLEO

CLEO Collaboration, Jim Libby

摘要:

给出了在两个不同的质心能量范围内e+e- ->强子的总截面的测量结果。测量是使用康奈尔电子储存环的CLEO III和CLEO-c探测器进行的。绝对截面和R的值,强子对μ子对生产的截面的比例,确定在7个质心的能量在6.964和10.538 GeV之间。总截面和值的R也被确定在13个质心的能量在3.97和4.26 GeV之间,此外,包容性和排他性的截面D+,D 0和Ds+生产。此外,在较低的质心能量范围内,给出了由两个粲介子组成的末态:DDbar,D*Dbar,DDbar*,D*Dbar*,Ds+Ds-,Ds*+Ds-,Ds+Ds*-,DDbar*pi和D*Dbar*pi的排它截面.

英文摘要:

Measurements of the total cross section of e+e- -> hadrons are presented in two different ranges of centre-of-mass energy. The measurements are made using the CLEO III and CLEO-c detectors at the Cornell Electron Storage Ring. The absolute cross sections and the values of R, the ratio of hadronic to muon pair production cross sections, are determined at seven centre-of-mass energies between 6.964 and 10.538 GeV. The total cross sections and values of R are also determined at thirteen centre-of-mass energies between 3.97 and 4.26 GeV; in addition, the inclusive and exclusive cross sections for D+, D0 and Ds+ production are presented. Furthermore, for the lower centre-of-mass energy range, exclusive cross-sections are presented for final states consisting of two charm mesons: DDbar, D*Dbar, DDbar*, D*Dbar*, Ds+Ds-, Ds*+Ds-, Ds+Ds*-, DDbar*pi and D*Dbar*pi.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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