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Soft limits of the wavefunction in exceptional scalar theories

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arxiv 2203.05576 v2 pith:BI5SI4C6 submitted 2022-03-10 hep-th gr-qc

Noah Bittermann , Austin Joyce This is my paper · ORCID
classification hep-thgr-qc
keywords softtheorieswavefunctioninformationscalarstructureamplitudecoefficients
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We study the structure of the flat space wavefunctional in scalar field theories with nonlinearly realized symmetries. These symmetries imply soft theorems that are satisfied by wavefunction coefficients in the limit where one of the external momenta is scaled to zero. After elucidating the structure of these soft theorems in the nonlinear sigma model, Dirac-Born-Infeld, and galileon scalar theories, we combine them with information about the singularity structure of the wavefunction to bootstrap the wavefunction coefficients of these theories. We further systematize this construction through two types of recursion relations: one that utilizes the flat space scattering amplitude plus minimal information about soft limits, and an alternative that does not require amplitude input, but does require subleading soft information.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Effective Field Theory and In-In Correlators

    hep-th 2024-12 conditional novelty 7.0 of 10

    Matching in-in correlators between a full theory and its effective theory requires extra boundary terms in flat space, but those terms fade away in de Sitter space.

  2. Correlators are simpler than wavefunctions

    hep-th 2025-12 unverdicted novelty 6.0 of 10

    Equal-time correlators are simpler than wavefunctions because they come from full-spacetime integrals; this implies fewer poles, cleaner factorization, and a systematic pole expansion whose first subleading term vanishes.

  3. Hidden Adler zeros and soft theorems for inflationary perturbations

    hep-th 2024-11 conditional novelty 6.0 of 10

    A new soft hierarchy makes soft theorems for inflationary perturbations independent of off-shell cubic vertices and fixes superfluid and scaling superfluid amplitudes up to the sound speed.

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