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arXiv 1105.2138hep-phhep-lat
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RI /“SMOM格式中Wilson算子在两个环上的n = 3矩的振幅

Amplitudes for the n = 3 moment of the Wilson operator at two loops in the RI/'SMOM scheme

J. A. Gracey

摘要:

在RI ′/S重正化格式下,将twist-2味非单态Wilson算子的三阶矩重正化为两个环.这涉及到重整化算子本身和它混合的两个全导数算子,方法是将它插入夸克2点函数,并计算对称减法点处的振幅。导出了相应的两个圈转换函数,并由此导出了三圈朗道规范反常维数。在MSbar和RI '/S格式中给出了每个算子的双环格林函数的全部振幅。

英文摘要:

The renormalization of the third moment of the twist-2 flavour non-singlet Wilson operator is given to two loops in the RI'/SMOM renormalization scheme. This involves renormalizing the operator itself and the two total derivative operators into which it mixes by inserting it into a quark 2-point function and evaluating the amplitudes at the symmetric subtraction point. The corresponding two loop conversion functions are derived from which the three loop Landau gauge anomalous dimension is deduced. The full set of amplitudes for the two loop Green's function for each of the operators are given in both the MSbar and RI'/SMOM schemes.

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