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20062009
most citedEstimate of BR(B -> X_s gamma) at O(alpha_s^2)

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hep-th2006★ 429 cited

The Four-Loop Planar Amplitude and Cusp Anomalous Dimension in Maximally Supersymmetric Yang-Mills Theory

Zvi Bern, Michael Czakon, Lance J. Dixon +2

We present an expression for the leading-color (planar) four-loop four-point amplitude of N=4 supersymmetric Yang-Mills theory in 4-2 e dimensions, in terms of eight separate integ…