324 citations · 2.8k across the 43 of their papers we have counts for
44 papers
Positivity with Long-Range Interactions
B. Bellazzini, J. Berman, G. Isabella +3
We introduce infrared finite, analytic, crossing symmetric, Regge behaved, and Lorentz invariant amplitudes , labeled by the experimental energy resolut…
(Super)Gravity from Positivity
Brando Bellazzini, Alex Pomarol, Marcello Romano +1
We investigate whether the effective theory for isolated, massive, and weakly interacting spin- particles is compatible with causality and unitarity-i.e., the positivity of sc…
Continuous-Spin Particles, On Shell
Brando Bellazzini, Stefano De Angelis, Marcello Romano
We study on-shell scattering amplitudes for continuous-spin particles (CSPs). Poincaré invariance, little-group covariance, analyticity, and on-shell factorisation (unitar…
Massive Gravity is not Positive
Brando Bellazzini, Giulia Isabella, Sara Ricossa +1
We derive new positivity bounds at finite momentum transfer, assuming a large separation between the mass of the lightest particle in the effective theory and the mass gap …
Classical vs Quantum Eikonal Scattering and its Causal Structure
Brando Bellazzini, Giulia Isabella, Massimiliano Maria Riva
We study the eikonal scattering of two gravitationally interacting bodies, in the regime of large angular momentum and large center of mass energy. We show that eikonal exponentiat…
The IR-Side of Positivity Bounds
Brando Bellazzini, Marc Riembau, Francesco Riva
We show how calculable IR loop effects impact positivity bounds in Effective Field Theories with causal and unitary UV completions. We identify infrared singularities which appear…