https://doi.org/10.1140/epjc/s10052-023-11698-2
Regular Article - Theoretical Physics
Tree and 1-loop fundamental BCJ relations from soft theorems
Center for Gravitation and Cosmology, College of Physical Science and Technology, Yangzhou University, 225009, Yangzhou, China
Received:
9
May
2023
Accepted:
7
June
2023
Published online:
14
July
2023
We provide a new derivation of the fundamental BCJ relation among double-color-ordered tree amplitudes of bi-adjoint scalar theory, based on the leading soft theorem for external scalars. Then, we generalize the fundamental BCJ relation to 1-loop Feynman integrands. We also use the fundamental BCJ relation to understand Adler’s zero for tree amplitudes of the nonlinear sigma model and Born–Infeld theory.
© The Author(s) 2023
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