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Two-loop off-shell QCD amplitudes in FDR
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DOI：10.1007/JHEP11(2015)183.png)
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摘要
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We link the FDR treatment of ultraviolet (UV) divergences to dimensional regularization up to two loops in QCD. This allows us to derive the one-loop and two-loop coupling constant and quark mass shifts necessary to translate infrared finite quantities computed in FDR to the MS renormalization scheme. As a by-product of our analysis, we solve a problem analogous to the historical difficulties of the Four Dimensional Helicity (FDH) method beyond one loop. An alternative formulation of FUJI is then presented that preserves the renormalizability properties of QCD without introducing evanescent quantities.
Keyword:
Renormalization Regularization and Renormalons
QCD
Scattering Amplitudes
期刊
IF:
5.5
论文数:
4.0W
被引数:
13.7W
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