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Improved Positivity Bounds and Massive Gravity
Claudia de Rham, Scott Melville, Andrew J. Tolley
Theories such as massive Galileons and massive gravity can satisfy the presently known improved positivity bounds provided they are weakly coupled. We discuss the form of the EFT L…
UV complete me: Positivity Bounds for Particles with Spin
Claudia de Rham, Scott Melville, Andrew J. Tolley +1
For a low energy effective theory to admit a standard local, unitary, analytic and Lorentz-invariant UV completion, its scattering amplitudes must satisfy certain inequalities. Whi…
Unitary null energy condition violation in cosmologies
Claudia de Rham, Scott Melville
A non-singular cosmological bounce in the Einstein frame can only take place if the Null Energy Condition (NEC) is violated. We explore situations where a single scalar field drive…
Massive Galileon Positivity Bounds
Claudia de Rham, Scott Melville, Andrew J. Tolley +1
The EFT coefficients in any gapped, scalar, Lorentz invariant field theory must satisfy positivity requirements if there is to exist a local, analytic Wilsonian UV completion. We a…
Positivity Bounds for Scalar Theories
Claudia de Rham, Scott Melville, Andrew J. Tolley +1
Assuming the existence of a local, analytic, unitary UV completion in a Poincaré invariant scalar field theory with a mass gap, we derive an infinite number of positivity requireme…