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arXiv 1206.0065hep-ex
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用JADE数据测量e+e湮没中3喷注速率的强耦合α_s

Measurement of the strong coupling alpha_s from the 3-jet rate in e+e- annihilation using JADE data

Stefan Kluth

摘要:

本文描述了用JADE探测器在质心能量为14 - 44 GeV的e+e湮灭强子末态中测量的强耦合α_S(m_Z)。射流重建与达勒姆射流聚类算法。JADE 3喷流速率数据与QCD的NNLO预测结合的图形化NNLA计算进行了比较。我们发现数据和预测之间有很好的一致性,并提取α_S(m_Z)= 0.1199 +/- 0.0010(stat.)+/- 0.0021(实验)+/- 0.0054(有)+/- 0.0007(理论值)。

英文摘要:

We describe a measurement of the strong coupling alpha_S(m_Z) from the 3-jet rate in hadronic final states of e+e- annihilation recorded with the JADE detector at centre-of-mass energies of 14 to 44 GeV. The jets are reconstructed with the Durham jet clustering algorithm. The JADE 3-jet rate data are compared with QCD predictions in NNLO combined with resummed NNLA calculations. We find good agreement between the data and the prediction and extract alpha_S(m_Z)= 0.1199 +/- 0.0010(stat.) +/- 0.0021(exp.) +/- 0.0054(had.) +/- 0.0007(theo.).

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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