8 papers
Large deflection scattering, soft radiation and KMOC formalism
Samim Akhtar, Alok Laddha, Arkajyoti Manna +1
KMOC (Kosower, Maybee, and O'Connell) formalism is an approach to analyze classical scattering in gauge theories and gravity using a class of ``inclusive'' observables which can be…
Towards the Parametric Renormalization of the S-matrix -- I
Pinaki Banerjee, Harsh, Alok Laddha
Zimmermann's forest formula is the corner stone of perturbative renormalization in QFT. By renormalizing individual Feynman graphs, it generates the UV finite S-matrix. This approa…
The Classical Super-Phaserotation Infrared Triangle
Sangmin Choi, Alok Laddha, Andrea Puhm
The universality of the logarithmic soft photon theorem in four dimensions can be traced to an infinite-dimensional asymptotic symmetry which acts as a local phase rotation on matt…
The Classical Super-Rotation Infrared Triangle
Sangmin Choi, Alok Laddha, Andrea Puhm
The universality of gravitational scattering at low energies and large distances encoded in soft theorems and memory effects can be understood from symmetries. In four-dimensional…
Asymptotic Symmetries for Logarithmic Soft Theorems in Gauge Theory and Gravity
Sangmin Choi, Alok Laddha, Andrea Puhm
Gauge theories and perturbative gravity in four dimensions are governed by a tower of infinite-dimensional symmetries which arise from tree-level soft theorems. However, aside from…
Symmetries of the gravitational scattering in the absence of peeling
Marc Geiller, Alok Laddha, Céline Zwikel
The symmetries of the gravitational scattering are intimately tied to the symmetries which preserve asymptotic flatness at null infinity. In Penrose's definition of asymptotic flat…