324 citations · 2.7k across the 36 of their papers we have counts for
9 papers · 1 filter
Negative running of gravitational positivity
J. Fernandez, M. Ruhdorfer, J. Serra
We investigate the one-loop renormalization group evolution in four dimensions of the leading operators in the effective field theories of shift-symmetric scalars, photons, and gra…
Causality Constraints on Black Holes beyond GR
Francesco Serra, Javi Serra, Enrico Trincherini +1
We derive causality constraints on the simplest scalar-tensor theories in which black holes differ from what General Relativity predicts, a scalar coupled to the Gauss-Bonnet or th…
RG of GR from On-shell Amplitudes
Pietro Baratella, Dominik Haslehner, Maximilian Ruhdorfer +2
We study the renormalization group of generic effective field theories that include gravity. We follow the on-shell amplitude approach, which provides a simple and efficient method…
Massive Higher Spins: Effective Theory and Consistency
Brando Bellazzini, Francesco Riva, Javi Serra +1
We construct the effective field theory for a single massive higher-spin particle in flat spacetime. Positivity bounds of the S-matrix force the cutoff of the theory to be well bel…
Amplitudes' Positivity, Weak Gravity Conjecture, and Modified Gravity
Brando Bellazzini, Matthew Lewandowski, Javi Serra
We derive new positivity bounds for scattering amplitudes in theories with a massless graviton in the spectrum in four spacetime dimensions, of relevance for the weak gravity conje…
Beyond Amplitudes' Positivity and the Fate of Massive Gravity
Brando Bellazzini, Francesco Riva, Javi Serra +1
We constrain effective field theories by going beyond the familiar positivity bounds that follow from unitarity, analyticity, and crossing symmetry of the scattering amplitudes. As…