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Title: Positive signs in massive gravity

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [1]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States). Walter Burke Inst. for Theoretical Physics

Here, we derive new constraints on massive gravity from unitarity and analyticity of scattering amplitudes. Our results apply to a general effective theory defined by Einstein gravity plus the leading soft diffeomorphism-breaking corrections. We calculate scattering amplitudes for all combinations of tensor, vector, and scalar polarizations. Furthermore, the high-energy behavior of these amplitudes prescribes a specific choice of couplings that ameliorates the ultraviolet cutoff, in agreement with existing literature. We then derive consistency conditions from analytic dispersion relations, which dictate positivity of certain combinations of parameters appearing in the forward scattering amplitudes. These constraints exclude all but a small island in the parameter space of ghost-free massive gravity. And while the theory of the "Galileon" scalar mode alone is known to be inconsistent with positivity constraints, this is remedied in the full massive gravity theory.

Research Organization:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0010255; DGE-1144469
OSTI ID:
1327304
Journal Information:
Journal of High Energy Physics (Online), Vol. 2016, Issue 4; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 95 works
Citation information provided by
Web of Science

References (20)

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Infrared Consistency and the Weak Gravity Conjecture text January 2014
Causality, Analyticity and an IR Obstruction to UV Completion text January 2006

Cited By (12)

Slowly-rotating neutron stars in massive bigravity journal January 2018
Phenomenology in type-I minimally modified gravity journal January 2019
Constraints on a gravitational Higgs mechanism journal October 2019
Spin-2 fields and the weak gravity conjecture journal November 2019
Constraints on quasidilaton massive gravity journal December 2019
Bounds on amplitudes in effective theories with massive spinning particles journal August 2018
Spin-2 fields and the weak gravity conjecture text January 2019
Softness and Amplitudes' Positivity for Spinning Particles text January 2016
Slowly-Rotating Neutron Stars in Massive Bigravity text January 2017
Phenomenology in type-I minimally modified gravity text January 2018
Entropy Bounds on Effective Field Theory from Rotating Dyonic Black Holes text January 2019
Sum Rules for Massive Spin-2 Kaluza-Klein Elastic Scattering Amplitudes text January 2019

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