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hep-th2026
NLSM amplitudes from a quartic two-derivative theory
Qu Cao, Zhenqi Han, Fan Zhu
We revisit the well-known nonlinear sigma model (NLSM), an effective field theory describing the scattering of Goldstone bosons and characterized by an infinite to…
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…