首页> 外文期刊>International Journal of Modern Physics, A. Particles and Fields, Gravitation, Cosmology >THE NLO QCD CALCULATION OF SEA QUARK DISTRIBUTIONS IN THE CORGI APPROACH, BASED ON THE CONSTITUENT QUARK MODEL
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THE NLO QCD CALCULATION OF SEA QUARK DISTRIBUTIONS IN THE CORGI APPROACH, BASED ON THE CONSTITUENT QUARK MODEL

机译:基于组成型夸克模型的柯基方法中海夸克分布的NLO QCD计算

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摘要

Sea quark distributions in the NLO approximation, based on the phenomenological valon model or constituent quark model are analyzed. We use the parametrized inverse Mellin transform technique to perform a direct fit with available experimental data and obtain the unknown parameters of the distributions. We try to extend the calculation to the NLO approximation for the singlet and nonsinglet cases in DIS phenomena. We do also the same calculation for electron–positron annihilation. The resulting sea distributions are effectively independent of the process used. The approach of complete RG improvement (CORGI) is employed and the results are compared with the standard approach of perturbative QCD in the scheme with a physical scale. The comparisons with data are in good agreement. As is expected, the results in the CORGI approach indicate a better agreement to the data than the NLO calculation in the standard approach.
机译:基于现象学的瓦伦模型或构成夸克模型,对NLO近似中的海夸克分布进行了分析。我们使用参数化的梅林逆变换技术对可用的实验数据进行直接拟合,并获得未知的分布参数。对于DIS现象中的单重态和非单一态,我们尝试将计算扩展到NLO近似。对于电子-正电子an灭,我们也进行相同的计算。产生的海洋分布实际上与所使用的过程无关。采用完全RG改进方法(CORGI),并将结果与​​具有物理规模的方案中扰动QCD的标准方法进行比较。与数据的比较非常吻合。不出所料,CORGI方法的结果表明,与数据相比,标准方法中的NLO计算具有更好的一致性。

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