effective field theory 1loop calculations 1nonlinear sigma model 1quartic interaction 1scattering amplitudes 1soft theorems 1
From the 1 of 2 linked papers with an AI index.
2 papers
hep-th2026
NLSM amplitudes from a quartic two-derivative theory
Qu Cao, Zhenqi Han, Fan Zhu
The paper presents a local scalar Lagrangian with a single quartic two-derivative interaction that exactly reproduces planar nonlinear sigma model (NLSM) amplitudes at all loop ord…
hep-th2026
Planar loop integrands from cuts in dimensions
Fan Zhu, Song He, Zhenqi Han
We present a direct reconstruction formula for planar loop integrands from -dimensional generalized unitarity cuts in any colored theory. The reconstruction combinatorics is sep…