240 citations · 2.5k across the 73 of their papers we have counts for
73 papers
Zeta Functions and the Superstring
Grant N. Remmen
The superstring amplitude's Mellin transform in energy is computed at fixed momentum transfer. In the forward limit, it is shown that this transformed amplitude reduces to the Riem…
Axions Create Singularities on Extremal Horizons
Gary T. Horowitz, Maciej Kolanowski, Grant N. Remmen +1
We show that axions cause extremal black holes to have singular horizons. This is true for almost all values of the axion mass and coupling provided the black hole is rotating and…
Multipositivity Constrains the Chiral Lagrangian
Clifford Cheung, Jaehoon Jeong, Pyungwon Ko +3
The chiral Lagrangian is a cornerstone of modern particle physics, offering a systematic and quantitative description of low-energy pions. Using tools from the modern scattering am…
The Equivalence Principle at High Energies Completes the Spectrum
Francesco Calisto, Clifford Cheung, Grant N. Remmen +2
We prove a version of the completeness hypothesis that follows from the coexistence of symmetry and gravity: tree-level gravitational scattering mandates single-particle states in…
Inverse Problem in Effective Field Theory
Francesco Calisto, Clifford Cheung, Grant N. Remmen +2
We show that the tree-level spectrum of heavy particles can be directly extracted from the Wilson coefficients of the corresponding effective field theory at low energies. This pro…
Higher-Spin and Higher-Point Constraints on Stringy Amplitudes
Ivano Basile, Grant N. Remmen, Georgina Staudt
We employ multiparticle factorization to constrain deformations of tree-level open string amplitudes. Assuming minimal degeneracy among intermediate states of the same spin up thro…
Completeness from Gravitational Scattering
Francesco Calisto, Clifford Cheung, Grant N. Remmen +2
We prove that symmetry in the presence of gravity implies a version of the completeness hypothesis. For a broad class of theories, we demonstrate that the existence of finitely man…
Strings from Almost Nothing
Clifford Cheung, Grant N. Remmen, Francesco Sciotti +1
We argue that string theory emerges inevitably from a few simple assumptions about physical scattering. Consistency alone requires that all tree-level four-point scattering amplitu…
Multipositivity Bounds for Scattering Amplitudes
Clifford Cheung, Grant N. Remmen
Lorentz invariance, unitarity, and causality enforce powerful constraints on the theory space of physical scattering amplitudes. However, virtually all efforts in this direction ha…
Black Hole Complementarity and ER/EPR
Ning Bao, Grant N. Remmen
We demonstrate that wormholes must be entangled regardless of asymptotic boundary conditions. Assuming black hole complementarity, we argue that traversable wormholes instantiate e…
Open String Amplitudes: Singularities, Asymptotics, and New Representations
Nima Arkani-Hamed, Carolina Figueiredo, Grant N. Remmen
Open string amplitudes at tree level have been studied for over fifty years, but there is no known analytic form for general -point amplitudes, and their conventional representa…
Accidental Symmetry Near Extreme Spinning Black Holes
Avik Banerjee, Achilleas P. Porfyriadis, Grant N. Remmen
Near the horizon of extremal charged black holes, an accidental symmetry is known to act on zero-temperature perturbations, transforming them into finite-temperature ones. In this…
Positively Identifying HEFT or SMEFT
Grant N. Remmen, Nicholas L. Rodd
We establish the bounds on Wilson coefficients of the Higgs effective field theory (HEFT) mandated by unitarity and analyticity. These positivity constraints can be projected into…
LHC EFT WG Note: Basis for Anomalous Quartic Gauge Couplings
Gauthier Durieux, Grant N. Remmen, Nicholas L. Rodd +5
In this note, we give a definitive basis for the dimension-eight operators leading to quartic -- but no cubic -- interactions among electroweak gauge bosons. These are often called…
Uniqueness Criteria for the Virasoro-Shapiro Amplitude
Clifford Cheung, Aaron Hillman, Grant N. Remmen
The scattering amplitudes of string theory exhibit many extraordinary properties. But are they the unique mathematical objects to do so? Recently, it has been shown how the spectru…
Bootstrap Principle for the Spectrum and Scattering of Strings
Clifford Cheung, Aaron Hillman, Grant N. Remmen
We show that the Veneziano amplitude of string theory is the unique solution to an analytically solvable bootstrap problem. Uniqueness follows from two assumptions: faster than pow…
Sudden breakdown of effective field theory near cool Kerr-Newman black holes
Gary T. Horowitz, Maciej Kolanowski, Grant N. Remmen +1
It was recently shown that (near-)extremal Kerr black holes are sensitive probes of small higher-derivative corrections to general relativity. In particular, these corrections prod…
Positivity in Amplitudes and Quantum Entanglement
Rafael Aoude, Gilly Elor, Grant N. Remmen +1
We explore the connection of positivity of the imaginary part of forward elastic amplitudes for perturbative scattering with consistency of the entanglement generated by the S-matr…
Multiparticle Factorization and the Rigidity of String Theory
Nima Arkani-Hamed, Clifford Cheung, Carolina Figueiredo +1
Is string theory uniquely determined by self-consistency? Causality and unitarity seemingly permit a multitude of putative deformations, at least at the level of two-to-two scatter…
Holographic Screen Sequestration
Aidan Chatwin-Davies, Pompey Leung, Grant N. Remmen
Holographic screens are codimension-one hypersurfaces that extend the notion of apparent horizons to general (non-black hole) spacetimes and that display interesting thermodynamic…
Holographic entanglement from the UV to the IR
Xi Dong, Grant N. Remmen, Diandian Wang +2
In AdS/CFT, observables on the boundary are invariant under renormalization group (RG) flow in the bulk. In this paper, we study holographic entanglement entropy under bulk RG flow…
Bespoke Dual Resonance
Clifford Cheung, Grant N. Remmen
Dual resonance is one of the great miracles of string theory. At a fundamental level, it implies that the particles exchanged in different channels are subtly equivalent. Furthermo…
Extremal Kerr black holes as amplifiers of new physics
Gary T. Horowitz, Maciej Kolanowski, Grant N. Remmen +1
We show that extremal Kerr black holes are sensitive probes of new physics. Stringy or quantum corrections to general relativity are expected to generate higher-curvature terms in…
Stringy Dynamics from an Amplitudes Bootstrap
Clifford Cheung, Grant N. Remmen
We describe an analytic procedure whereby scattering amplitudes are bootstrapped directly from an input mass spectrum and a handful of physical constraints: crossing symmetry, boun…