187 citations · 1.4k across the 13 of their papers we have counts for
13 papers
Double-Copy Constructions and Unitarity Cuts
Zvi Bern, Scott Davies, Josh Nohle
The duality between color and kinematics enables the construction of multiloop gravity integrands directly from corresponding gauge-theory integrands. This has led to new nontrivia…
Evanescent Effects Can Alter Ultraviolet Divergences in Quantum Gravity without Physical Consequences
Zvi Bern, Clifford Cheung, Huan-Hang Chi +3
Evanescent operators such as the Gauss-Bonnet term have vanishing perturbative matrix elements in exactly D=4 dimensions. Similarly, evanescent fields do not propagate in D=4; a th…
The Ultraviolet Critical Dimension of Half-Maximal Supergravity at Three Loops
Zvi Bern, Scott Davies, Tristan Dennen
We determine the minimum dimension at which divergences first occur in half-maximal 16-supercharge supergravity at three loops. For the four-point amplitudes, we find that the crit…
Enhanced Ultraviolet Cancellations in N = 5 Supergravity at Four Loop
Zvi Bern, Scott Davies, Tristan Dennen
We show that the four-loop four-point amplitudes of N = 5 supergravity are ultraviolet finite in four dimensions, contrary to expectations based on supersymmetry and duality-symmet…
On Loop Corrections to Subleading Soft Behavior of Gluons and Gravitons
Zvi Bern, Scott Davies, Josh Nohle
Cachazo and Strominger recently proposed an extension of the soft-graviton theorem found by Weinberg. In addition, they proved the validity of their extension at tree level. This w…
Low-Energy Behavior of Gluons and Gravitons from Gauge Invariance
Zvi Bern, Scott Davies, Paolo Di Vecchia +1
We show that at tree level, on-shell gauge invariance can be used to fully determine the first subleading soft-gluon behavior and the first two subleading soft-graviton behaviors.…