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The surprisingly large value of r, the ratio of power in tensor to scalar density perturbations in the CMB reported by the BICEP2 Collaboration, if confirmed, provides strong evidence for

The surprisingly large value of r, the ratio of power in tensor to scalar density perturbations in the CMB reported by the BICEP2 Collaboration, if confirmed, provides strong evidence for Inflation at the GUT scale. While the Inflationary signal remains the best motivated source, a large value of r alone would still allow for the possibility that a comparable gravitational wave background might result from a self ordering scalar field (SOSF) transition that takes place later at somewhat lower energy.

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    Date Created
    • 2014-07-30
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    • Digital object identifier: 10.1016/j.physletb.2014.07.046
    • Identifier Type
      International standard serial number
      Identifier Value
      0370-2693
    • Identifier Type
      International standard serial number
      Identifier Value
      1873-2445
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    Dent, J. B., Krauss, L. M., & Mathur, H. (2014). Killing the straw man: Does BICEP prove inflation at the GUT scale? Physics Letters B, 736, 305-307. doi:10.1016/j.physletb.2014.07.046

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