Structure of Chern-Simons scattering amplitudes from topological equivalence theorem and double-copy

YF Hang, HJ He, C Shen - Journal of High Energy Physics, 2022 - Springer
A bstract We study the mechanism of topological mass-generation for 3d Chern-Simons
(CS) gauge theories, where the CS term can retain the gauge symmetry and make gauge …

Unitarization from geometry

J Bonifacio, K Hinterbichler - Journal of High Energy Physics, 2019 - Springer
A bstract We study the perturbative unitarity of scattering amplitudes in general dimensional
reductions of Yang-Mills theories and general relativity on closed internal manifolds. For the …

Bootstrap bounds on closed Einstein manifolds

J Bonifacio, K Hinterbichler - Journal of High Energy Physics, 2020 - Springer
A bstract A compact Riemannian manifold is associated with geometric data given by the
eigenvalues of various Laplacian operators on the manifold and the triple overlap integrals …

Graviton-photon production with a massive spin-2 particle

JA Gill, D Sengupta, AG Williams - Physical Review D, 2023 - APS
A recent paper within a phenomenological dark matter framework with a massive graviton in
the external state argued that a divergence with increasing center-of-momentum energy …

Massive spin-2 scattering amplitudes in extra-dimensional theories

RS Chivukula, D Foren, KA Mohan, D Sengupta… - Physical Review D, 2020 - APS
In this paper we describe in detail the computation of the scattering amplitudes of massive
spin-2 Kaluza-Klein excitations in a gravitational theory with a single compact extra …

Scattering amplitudes of massive spin-2 Kaluza-Klein states with matter

RS Chivukula, JA Gill, KA Mohan, D Sengupta… - Physical Review D, 2024 - APS
We perform a comprehensive analysis of the scattering of matter and gravitational Kaluza-
Klein (KK) modes in five-dimensional gravity theories. We consider matter localized on a …

Dark matter interacting via a massive spin-2 mediator in warped extra-dimensions

A de Giorgi, S Vogl - Journal of High Energy Physics, 2021 - Springer
A bstract We study dark matter interacting via a massive spin-2 mediator. To have a
consistent effective theory for the spin-2 particle, we work in a warped extra-dimensional …

Structure of Kaluza-Klein graviton scattering amplitudes from the gravitational equivalence theorem and double copy

YF Hang, HJ He - Physical Review D, 2022 - APS
We study the structure of scattering amplitudes of the Kaluza-Klein (KK) gravitons and of the
gravitational KK Goldstone bosons in the compactified 5d general relativity (GR). We …

Scattering amplitudes of Kaluza-Klein strings and extended massive double-copy

Y Li, YF Hang, HJ He, S He - Journal of High Energy Physics, 2022 - Springer
A bstract We study the scattering amplitudes of massive Kaluza-Klein (KK) states of open
and closed bosonic strings under toroidal compactification. We analyze the structure of …

Symmetries, spin-2 scattering amplitudes, and equivalence theorems in warped five-dimensional gravitational theories

RS Chivukula, JA Gill, KA Mohan, D Sengupta… - Physical Review D, 2024 - APS
Building on work by Hang and He, we show how the residual five-dimensional
diffeomorphism symmetries of compactified gravitational theories with a warped extra …