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- W4297669757 abstract "We re-examine the constraints imposed by causality and unitarity on the low-energy effective field theory expansion of four-particle scattering amplitudes, exposing a hidden totally positive structure strikingly similar to the positive geometries associated with grassmannians and amplituhedra. This forces the infinite tower of higher-dimension operators to lie inside a new geometry we call the EFThedron. We initiate a systematic investigation of the boundary structure of the EFThedron, giving infinitely many linear and non-linear inequalities that must be satisfied by the EFT expansion in any theory. We illustrate the EFThedron geometry and constraints in a wide variety of examples, including new consistency conditions on the scattering amplitudes of photons and gravitons in the real world." @default.
- W4297669757 created "2022-09-30" @default.
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- W4297669757 date "2020-12-31" @default.
- W4297669757 modified "2023-09-29" @default.
- W4297669757 title "The EFT-Hedron" @default.
- W4297669757 doi "https://doi.org/10.48550/arxiv.2012.15849" @default.
- W4297669757 hasPublicationYear "2020" @default.
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