Detecting higher spin fields through statistical anisotropy in the CMB
  bispectrum
  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.
