12. March 2018
G. Franciolini, A. Kehagias, A. Riotto, M. Shiraishi, [arXiv:1803.03814].
Inflation may provide a suitable collider to probe physics at very high energies. In this paper we investigate the impact on the CMB bispectrum of higher-spin fields which are long-lived on super-Hubble scales, e.g. partially massless higher-spin fields. We show that distinctive statistical anisotropic signals on the CMB three-point correlator are induced and we investigate their detectability.