1.3k citations · 25.6k across the 179 of their papers we have counts for
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Cancelling the U(1) Anomaly in the S-matrix of N=4 Supergravity
Zvi Bern, Julio Parra-Martinez, Radu Roiban
supergravity is understood to contain a anomaly which manifests itself via the nonvanishing of loop-level scattering amplitudes that violate a tree-level char…
Dual Conformal Symmetry, Integration-by-Parts Reduction, Differential Equations and the Nonplanar Sector
Zvi Bern, Michael Enciso, Harald Ita +1
We show that dual conformal symmetry, mainly studied in planar super-Yang-Mills theory, has interesting consequences for Feynman integrals in nonsupersymmetric the…
The Five-Loop Four-Point Integrand of N=8 Supergravity as a Generalized Double Copy
Zvi Bern, John Joseph M. Carrasco, Wei-Ming Chen +3
We use the recently developed generalized double-copy procedure to construct an integrand for the five-loop four-point amplitude of N=8 supergravity. This construction starts from…
Curvature-Squared Multiplets, Evanescent Effects and the U(1) Anomaly in N = 4 Supergravity
Zvi Bern, Alex Edison, David Kosower +1
We evaluate one-loop amplitudes of N = 4 supergravity in D dimensions using the double-copy procedure that expresses gravity integrands in terms of corresponding ones in Yang--Mill…
Manifesting enhanced cancellations in supergravity: integrands versus integrals
Zvi Bern, Michael Enciso, Julio Parra-Martinez +1
Examples of "enhanced ultraviolet cancellations" with no known standard-symmetry explanation have been found in a variety of supergravity theories. By examining one- and two-loop e…
Two-Loop Renormalization of Quantum Gravity Simplified
Zvi Bern, Huan-Hang Chi, Lance Dixon +1
The coefficient of the dimensionally regularized two-loop R^3 divergence of (nonsupersymmetric) gravity theories has recently been shown to change when non-dynamical three forms ar…