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arXiv hep-ex/0209022hep-ex
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来自JADE的alpha_S和功率校正

alpha_S and Power Corrections from JADE

P. A. Movilla Fernandez

摘要:

在对事件形状和强子化模型进行图解计算的基础上,利用重新分析的JADE数据确定了sqrt{s} = 14-44 GeV的α_S。综合结果为α_S(M_Z)= 0.1194 +/- 0.0082/0.0068,与世界平均值一致。事件形状也被用来检验基于分析模型的功率修正和验证QCD的规范结构。模型中唯一的非微扰参数α_0被测得为α_0(2GeV)= 0.503 +/- 0.066/0.045,并且在总误差范围内具有普适性。

英文摘要:

Re-analysed JADE data were used to determine alpha_S at sqrt{s} = 14-44 GeV on the basis of resummed calculations for event shapes and hadronisation models tuned to LEP data. The combined result is alpha_S(M_Z) = 0.1194 +/- 0.0082/0.0068 which is consistent with the world average. Event shapes have also been used to test power corrections based on an analytical model and to verify the gauge structure of QCD. The only non-perturbative parameter alpha_0 of the model was measured to alpha_0(2GeV) = 0.503 +/- 0.066/0.045 and is found to be universal within the total errors.

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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