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Signature of supersymmetry from the early universe

Daniel Baumann1,2 and Daniel Green1

  • 1School of Natural Sciences, Institute for Advanced Study, Princeton, New Jersey 08540, USA
  • 2Centre for Theoretical Cosmology, Cambridge University, Cambridge, CB3 0WA, United Kingdom

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Phys. Rev. D 85, 103520 – Published 18 May, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.103520

Abstract

Supersymmetry plays a fundamental role in the radiative stability of many inflationary models. Spontaneous breaking of the symmetry inevitably leads to fields with masses of order the Hubble scale during inflation. When these fields couple to the inflaton, they produce a unique signature in the squeezed limit of the three-point function of primordial curvature perturbations. In this paper, we make this connection between naturalness, supersymmetry, Hubble-mass degrees of freedom, and the squeezed limit precise. To study the physics in a model-insensitive way, we develop a supersymmetric effective theory of inflation. We use the effective theory to classify all possible interactions between the inflaton and the additional fields, and determine which ones naturally allow large non-Gaussianities when protected by supersymmetry. Finally, we discuss the tantalizing prospect of using cosmological observations as a probe of supersymmetry.

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Outline

Information

Phys. Rev. D 85, 103520– Published 18 May, 2012
  • Received 12 November 2011
Article part of CHORUS

© 2012 American Physical Society

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