The electroweak effective field theory from on-shell amplitudes

G Durieux, T Kitahara, Y Shadmi, Y Weiss - Journal of High Energy Physics, 2020 - Springer
A bstract We apply on-shell methods to the bottom-up construction of electroweak
amplitudes, allowing for both renormalizable and non-renormalizable interactions. We use …

BCJ amplitude relations for Anti-de Sitter boundary correlators in embedding space

P Diwakar, A Herderschee, R Roiban… - Journal of High Energy …, 2021 - Springer
A bstract We generalize the color/kinematics duality of flat-space scattering amplitudes to the
embedding space formulation of AdS boundary correlators. Kinematic numerators and …

The rise of SMEFT on-shell amplitudes

R Aoude, CS Machado - Journal of High Energy Physics, 2019 - Springer
A bstract We present a map between the tree-level Standard Model Effective Theory
(SMEFT) in the Warsaw basis and massive on-shell amplitudes. As a first step, we focus on …

Momentum shift and on-shell constructible massive amplitudes

Y Ema, T Gao, W Ke, Z Liu, KF Lyu, I Mahbub - Physical Review D, 2024 - APS
We construct tree-level amplitude for massive particles using on-shell recursion relations
based on two classes of momentum shifts: an all-line transverse shift that deforms …

Supergravity Amplitudes, the Double Copy, and Ultraviolet Behavior

Z Bern, JJ Carrasco, M Chiodaroli, H Johansson… - Handbook of Quantum …, 2024 - Springer
In this chapter, we present a scattering-amplitudes perspective on supergravity and describe
its application to the study of ultraviolet properties of supergravity theories at high-loop …

On-shell Higgsing for EFTs

R Balkin, G Durieux, T Kitahara, Y Shadmi… - Journal of High Energy …, 2022 - Springer
A bstract We study the on-shell version of the Higgs mechanism in effective theories (EFTs)
containing particles of different spins, focusing on contact terms as a simple starting point …

Algebraic branch points at all loop orders from positive kinematics and wall crossing

A Herderschee - Journal of High Energy Physics, 2021 - Springer
A bstract There is a remarkable connection between the boundary structure of the positive
kinematic region and branch points of integrated amplitudes in planar\(\mathcal {N}\)= 4 …

Momentum shift and on-shell recursion relation for electroweak theory

Y Ema, T Gao, W Ke, Z Liu, KF Lyu, I Mahbub - Physical Review D, 2024 - APS
We study the all-line transverse (ALT) shift which we developed for on-shell recursion of
amplitudes for particles of any mass. We discuss the validity of the shift for general theories …

Spinor-helicity formalism for massive and massless amplitudes in five dimensions

M Chiodaroli, M Günaydin, H Johansson… - Journal of High Energy …, 2023 - Springer
A bstract Five-dimensional gauge and gravity theories are known to exhibit striking
properties. D= 5 is the lowest dimension where massive tensor states appear naturally …

Supersymmetric massive gravity

L Engelbrecht, CRT Jones, S Paranjape - Journal of High Energy Physics, 2022 - Springer
A bstract We initiate a systematic study of the self-interactions of a massive spin-2 “graviton”
consistent with up to\(\mathcal {N}\)= 4 supersymmetry. Using a recently developed massive …