Hidden Zeros in Scaffolded General Relativity and Exceptional Field Theories
Abstract: It was recently discovered by Arkani-Hamed et al that the colour-ordered scattering amplitudes of Tr$(\Phi3)$, the NLSM and scaffolded YM vanish at specific loci. We build on this observation and demonstrate that, beyond colour ordering, scattering amplitudes can display multiple instances of these hidden zeros. A first example are the flavour-ordered amplitudes of scaffolded General Relativity, corresponding to graviton exchange. The other two cases are multi-flavour DBI and the special Galileon. These are the natural generalisations of the NLSM with multiple instances of Adler's zero. The zero loci naturally define factorisation limits; in all three cases these include a metric-coupled cubic scalar theory. We comment on the general picture of hidden zeros and the relation to the double copy.
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- D. Roest, JHEP 01, 096 (2021), arXiv:2004.09559 [hep-th] .
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