| Scheme-scale ambiguity in analysis of QCD observable |
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| 作者姓名： | A. Mirjalili B. A. Kniehl |
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| 作者单位： | Physics Department, Yazd University, P.O.B 89195-741, Yazd, Iran; School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM) P.O. Box 19395-5531, Tehran, Iran; Institute for Theoretical Physics-II, Hamburg University, Luruper Chaussee 149, 22761 Hamburg, Germany |
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| 摘 要： | The scheme-scale ambiguity that has plagued perturbative analysis in QCD remains on obstacle to making precise tests of the theory.Many attempts have been done to resolve the scale ambiguity.In this regard the BLM,EC,PMS and CORGI approaches are more distinct.We try to employ these methods to fix the scale ambiguity at NLO,NNLO and even in more higher order approximations.By optimizing the renormalization scale,there will be a possibility to predicate higher order terms.We present general results for predicted terms at any order,using different optimization methods.Some observable as specific examples will be used to indicate the validity of scale fixing to predicate the higher order terms.
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| 关 键 词： | QCD 歧义 非线性光学 模糊性 微扰分析 高阶近似 高阶项 管理局 |
| 收稿时间： | 2010-2-9 |
Scheme-scale ambiguity in analysis of QCD observable |
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| A. Mirjalili,B. A. Kniehl.Scheme-scale ambiguity in analysis of QCD observable[J].High Energy Physics and Nuclear Physics,2010,34(9):1523-1526. |
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| Authors: | A Mirjalili B A Kniehl |
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| Institution: | 2School of Particles and Accelerators,Institute for Research in Fundamental Sciences (IPM) P.O.Box 19395-5531,Tehran,Iran ;3 Institute for Theoretical Physics-II,Hamburg University,Luruper Chaussee 149,22761 Hamburg,Germany) |
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| Abstract: | perturbative QCD scheme and scale dependence optimization approach predicted terms |
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| Keywords: | perturbative QCD scheme and scale dependence optimization approach predicted terms |
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