Vector Correlator in Massless QCD at Order O( 4 ) and the QED -function at five loop
Vector Correlator in Massless QCD at Order O( 4 ) and the QED -function at five loop
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发表时间：
2012
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通讯作者：
P. Baikov;K. Chetyrkin;J. Kuhn;J. Rittinger;Russian Federation.
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作者：
P. Baikov;K. Chetyrkin;J. Kuhn;J. Rittinger;Russian Federation.
我们简要总结了O（α 4）阶无质量QCD中矢量相关器的最新结果，并给出了一般色群的所有颜色因子。作为直接结果，我们得出：(i)在MS-和mom -方案中，QCD对α 2 α 4阶QED β-函数的全部贡献；（ii）具有一般数量单电荷费米子的QED β-函数的α 6阶全五环结果，同样适用于MS-和mom -方案。
We present a concise summary of recent results for the vector correlator in massless QCD at order O(α 4 ), with all colour factors being given for a generic colour group. As a direct consequence we arrive at: (i) the full QCD contribution to the QED β-function of order α 2 α 4 in the MS- and MOM-schemes; (ii) the full five-loop result of order α 6 for the β-function of QED with a generic number of single-charged fermions, again for the MS- and MOM-schemes.