Inflation may provide a suitable collider to probe physics at very high energies. In this paper we investigate the impact on the cosmic microwave background 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 cosmic microwave background three-point correlator are induced and we investigate their detectability.
Detecting higher spin fields through statistical anisotropy in the CMB bispectrum
Franciolini G.;Riotto A.;
2018
Abstract
Inflation may provide a suitable collider to probe physics at very high energies. In this paper we investigate the impact on the cosmic microwave background 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 cosmic microwave background three-point correlator are induced and we investigate their detectability.
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