Four-Loop Collinear Anomalous Dimension in N = 4 Yang-Mills Theory - High Energy Physics - TheoryReportar como inadecuado




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Abstract: We report a calculation in N = 4 Yang-Mills of the four-loop term g^4 in thecollinear anomalous dimension glambda which governs the universal subleadinginfrared structure of gluon scattering amplitudes. Using the method ofobstructions to extract this quantity from the 1-epsilon singularity in thefour-gluon iterative relation at four loops, we find g^4 = -1240.9 with anestimated numerical uncertainty of 0.02%. We also analyze the implication ofour result for the strong coupling behavior of glambda, finding support forthe string theory prediction computed recently by Alday and Maldacena usingAdS-CFT.



Autor: Freddy Cachazo, Marcus Spradlin, Anastasia Volovich

Fuente: https://arxiv.org/







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