3 papers
hep-th2023
Triangular tessellations of one-loop scattering amplitudes in theory
Abhijit B. Das
Inspired by the recent work of Nima Arkani Hamed and collaborators who introduced the notion of positive geometry to account for the structure of tree-level scattering amplitudes i…
hep-th2021
The Hopf Algebra Structure of the Two Loop Three Mass Non-Planar Feynman Diagram
B. Ananthanarayan, Abhijit B. Das, Daniel Wyler
The method of using Hopf algebras for calculating Feynman integrals developed by Abreu et al. is applied to the two-loop non-planar on-shell diagram with massless propagators and t…
hep-ph2020
Asymptotic analysis of Feynman diagrams and their maximal cuts
B. Ananthanarayan, Abhijit B. Das, Ratan Sarkar
The ASPIRE program, which is based on the Landau singularities and the method of power geometry to unveil the regions required for the evaluation of a given Feynman diagram asympto…