ID: 2107.04558

Tree-level scattering amplitudes in nonlocal field theories

July 9, 2021

View on ArXiv
Leonardo Modesto, Gianluca Calcagni
High Energy Physics - Theory
General Relativity and Quant...

We prove in two ways that, for a special class of nonlocal field theories consistent with linear and non-linear stability at the classical level, and with unitarity and super-renormalizability or finiteness at the quantum level, the $n$-point tree-level scattering amplitudes are the same as those of the underlying local theory. In particular, the $n$-point amplitudes of nonlocal gravity, with or without coupling to matter, are the same as for Einstein's general relativity.

Similar papers 1