162 citations · 1.2k across the 29 of their papers we have counts for
30 papers
Energy Correlators in Perturbative Quantum Gravity
Enrico Herrmann, Murat Kologlu, Ian Moult
Despite tremendous progress in our understanding of scattering amplitudes in perturbative (super-) gravity, much less is known about other asymptotic observables, such as correlati…
Amplitudes, Supersymmetric Black Hole Scattering at , and Loop Integration
Zvi Bern, Enrico Herrmann, Radu Roiban +4
We compute the potential-graviton contribution to the scattering amplitude, the radial action, and the scattering angle of two extremal black holes in N = 8 supergravity at the fif…
The planar two-loop four-point form factor in maximally supersymmetric Yang-Mills theory
Tushar Gopalka, Enrico Herrmann
We derive the four-dimensional integrand of the maximal-helicity-violating four-particle form factor for the chiral part of the stress-tensor supermultiplet in planar $\mathcal{N}=…
Conservative binary dynamics at order in electrodynamics
Zvi Bern, Enrico Herrmann, Radu Roiban +4
We compute the potential-photon contributions to the classical relativistic scattering angle of two charged non-spinning bodies in electrodynamics through fifth order in the coupli…
Comparison of post-Minkowskian and self-force expansions: Scattering in a scalar charge toy model
Leor Barack, Zvi Bern, Enrico Herrmann +8
We compare numerical self-force results and analytical fourth-order post-Minkowskian (PM) calculations for hyperbolic-type scattering of a point-like particle carrying a scalar cha…
Effective Field Theory Islands from Perturbative and Nonperturbative Four-Graviton Amplitudes
Zvi Bern, Enrico Herrmann, Dimitrios Kosmopoulos +1
Theoretical data obtained from physically sensible field and string theory models suggest that gravitational Effective Field Theories (EFTs) live on islands that are tiny compared…
The SAGEX Review on Scattering Amplitudes, Chapter 7: Positive Geometry of Scattering Amplitudes
Enrico Herrmann, Jaroslav Trnka
Scattering amplitudes are both a wonderful playground to discover novel ideas in Quantum Field Theory and simultaneously of immense phenomenological importance to make precision pr…
The SAGEX Review on Scattering Amplitudes
Gabriele Travaglini, Andreas Brandhuber, Patrick Dorey +35
This is an introduction to, and invitation to read, a series of review articles on scattering amplitudes in gauge theory, gravity, and superstring theory. Our aim is to provide an…
Scalar QED as a toy model for higher-order effects in classical gravitational scattering
Zvi Bern, Juan Pablo Gatica, Enrico Herrmann +2
Quantum Electrodynamics (QED) serves as a useful toy model for classical observables in gravitational two-body systems with reduced complexity due to the linearity of QED. We inves…
Integrands of Less-Supersymmetric Yang-Mills at One Loop
Jacob L. Bourjaily, Enrico Herrmann, Cameron Langer +3
We construct a prescriptive, bubble power-counting basis of one-loop integrands suitable for representing amplitude integrands in less-supersymmetric Yang-Mills theory. With the ex…
Radiative Classical Gravitational Observables at from Scattering Amplitudes
Enrico Herrmann, Julio Parra-Martinez, Michael S. Ruf +1
We compute classical gravitational observables for the scattering of two spinless black holes in general relativity and supergravity in the formalism of Kosower,…
Gravitational Bremsstrahlung from Reverse Unitarity
Enrico Herrmann, Julio Parra-Martinez, Michael S. Ruf +1
We compute the total radiated momentum carried by gravitational waves during the scattering of two spinless black holes at the lowest order in Newton's constant, ,…
Positive geometry, local triangulations, and the dual of the Amplituhedron
Enrico Herrmann, Cameron Langer, Jaroslav Trnka +1
We initiate the systematic study of \emph{local positive spaces} which arise in the context of the Amplituhedron construction for scattering amplitudes in planar maximally supersym…
Building Bases of Loop Integrands
Jacob L. Bourjaily, Enrico Herrmann, Cameron Langer +1
We describe a systematic approach to the construction of loop-integrand bases at arbitrary loop-order, sufficient for the representation of general quantum field theories. We provi…
Positive Geometries for One-Loop Chiral Octagons
Enrico Herrmann, Cameron Langer, Jaroslav Trnka +1
Inspired by the topological sign-flip definition of the Amplituhedron, we introduce similar, but distinct, positive geometries relevant for one-loop scattering amplitudes in planar…
Soft gluon emission at two loops in full color
Lance J. Dixon, Enrico Herrmann, Kai Yan +1
The soft emission factor is a central ingredient in the factorization of generic -particle gauge theory amplitudes with one soft gluon in the external state. We present the comp…
All-Multiplicity Non-Planar MHV Amplitudes in sYM at Two Loops
Jacob L. Bourjaily, Enrico Herrmann, Cameron Langer +2
We give a closed-form, prescriptive representation of all-multiplicity two-loop MHV amplitude integrands in fully-color-dressed (non-planar) maximally supersymmetric Yang-Mills the…
Prescriptive Unitarity for Non-Planar Six-Particle Amplitudes at Two Loops
Jacob L. Bourjaily, Enrico Herrmann, Cameron Langer +2
We extend the applications of prescriptive unitarity beyond the planar limit to provide local, polylogarithmic, integrand-level representations of six-particle MHV scattering ampli…
Logarithmic forms and differential equations for Feynman integrals
Enrico Herrmann, Julio Parra-Martinez
We describe how a dlog representation of Feynman integrals leads to simple differential equations. We derive these differential equations directly in loop momentum or embedding spa…
Gravity loop integrands from the ultraviolet
Alex Edison, Enrico Herrmann, Julio Parra-Martinez +1
We demonstrate that loop integrands of (super-)gravity scattering amplitudes possess surprising properties in the ultraviolet (UV) region. In particular, we study the scaling of mu…
The two-loop five-point amplitude in supergravity
Samuel Abreu, Lance J. Dixon, Enrico Herrmann +2
We compute the symbol of the two-loop five-point amplitude in supergravity. We write an ansatz for the amplitude whose rational prefactors are based on not only 4-di…
Amplitudes at Infinity
Jacob L. Bourjaily, Enrico Herrmann, Jaroslav Trnka
We investigate the asymptotically large loop-momentum behavior of multi-loop amplitudes in maximally supersymmetric quantum field theories in four dimensions. We check residue-theo…
The two-loop five-point amplitude in super-Yang-Mills theory
Samuel Abreu, Lance J. Dixon, Enrico Herrmann +2
We compute the symbol of the two-loop five-point scattering amplitude in = 4 super-Yang-Mills theory, including its full color dependence. This requires constructing…
UV cancelations in gravity loop integrands
Enrico Herrmann, Jaroslav Trnka
In this work we explore the properties of four-dimensional gravity integrands at large loop momenta. This analysis can not be done directly for the full off-shell integrand but onl…