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Title: Effective Field Theories from Soft Limits of Scattering Amplitudes

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [1]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States). Walter Burke Inst. for Theoretical Physics
  2. Charles Univ., Prague (Czech Republic). Inst. of Particle and Nuclear Physics

Here, we derive scalar effective field theories—Lagrangians, symmetries, and all—from on-shell scattering amplitudes constructed purely from Lorentz invariance, factorization, a fixed power counting order in derivatives, and a fixed order at which amplitudes vanish in the soft limit. These constraints leave free parameters in the amplitude which are the coupling constants of well-known theories: Nambu-Goldstone bosons, Dirac-Born-Infeld scalars, and Galilean internal shift symmetries. Furthemore, soft limits imply conditions on the Noether current which can then be inverted to derive Lagrangians for each theory. We propose a natural classification of all scalar effective field theories according to two numbers which encode the derivative power counting and soft behavior of the corresponding amplitudes. In those cases where there is no consistent amplitude, the corresponding theory does not exist.

Research Organization:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0011632; SC0010255
OSTI ID:
1596701
Alternate ID(s):
OSTI ID: 1183796
Journal Information:
Physical Review Letters, Vol. 114, Issue 22; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 146 works
Citation information provided by
Web of Science

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Cited By (26)

How to avoid a swift kick in the chameleons journal March 2016
A geometrical approach to degenerate scalar-tensor theories journal February 2017
Internal supersymmetry and small-field Goldstini journal May 2018
Non-linear supersymmetry and TT¯$$ T\overline{T} $$-like flows journal February 2020
Soft bootstrap and supersymmetry journal January 2019
Symmetric superfluids text January 2019
Symmetric superfluids text January 2019
Constraining Higher Derivative Supergravity with Scattering Amplitudes text January 2015
New Double Soft Emission Theorems text January 2015
Double-Soft Limits of Gluons and Gravitons preprint January 2015
Softness and Amplitudes' Positivity for Spinning Particles text January 2016
Exploring soft constraints on effective actions text January 2016
Uniqueness from gauge invariance and the Adler zero text January 2016
Massive Galileon Positivity Bounds text January 2017
Operator bases, $S$-matrices, and their partition functions text January 2017
Two-loop supersymmetric QCD and half-maximal supergravity amplitudes text January 2017
Pions as Gluons in Higher Dimensions text January 2017
Ward Identity and Scattering Amplitudes for Nonlinear Sigma Models text January 2017
The Infrared Structure of Nambu-Goldstone Bosons text January 2018
Soft Bootstrap and Supersymmetry text January 2018
Perturbiner Methods for Effective Field Theories and the Double Copy text January 2018
The Infrared Structure of Exceptional Scalar Theories text January 2018
An Algebraic Classification of Exceptional EFTs text January 2019
Soft Bootstrap and Effective Field Theories text January 2019
Gauged Galileons text January 2019
UV considerations on scattering amplitudes in a web of theories text January 2019

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