1.3k citations · 25.6k across the 179 of their papers we have counts for
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hep-ph2001★ 145 cited
QCD and QED Corrections to Light-by-Light Scattering
Z. Bern, A. De Freitas, L. Dixon +2
We present the QCD and QED corrections to the fermion-loop contributions to light-by-light scattering, gamma gamma to gamma gamma, in the ultrarelativistic limit where the kinemati…
hep-ph2001★ 173 cited
Two-Loop Amplitudes for Gluon Fusion into Two Photons
Z. Bern, A. De Freitas, L. Dixon
We present the two-loop matrix elements for the scattering of two gluons into two photons in QCD. These matrix elements will enter into improved estimates of the QCD background to…
hep-th2001
Perturbative Quantization of Gravity Theories
Z. Bern
We discuss string theory relations between gravity and gauge theory tree amplitudes. Together with -dimensional unitarity, these relations can be used to perturbatively quantize…