Abstract
We describe a UV complete asymptotically fragile Lorentz-invariant theory exhibiting superluminal signal propagation. Its low energy effective action contains “wrong” sign higher dimensional operators. Nevertheless, the theory gives rise to an matrix, which is defined at all energies. As expected for a nonlocal theory, the corresponding scattering amplitudes are not exponentially bounded on the physical sheet, but otherwise are healthy. We study some of the physical consequences of this matrix.
- Received 3 January 2014
DOI:https://doi.org/10.1103/PhysRevD.89.084044
© 2014 American Physical Society