Abstract
The Planck satellite has recently measured the CMB temperature anisotropies with unprecedented accuracy, and it has provided strong bounds on primordial non-gaussianity. Such bounds constrain models of inflation, and mechanisms that produce the primordial perturbations. We discuss the non-gaussian signatures from the interactions of the inflation φ with spin-1 fields. We study the two different cases in which the inflaton is (i) a pseudo-scalar field with a φfa interaction with a vector field, and (ii) a scalar field with a f (φ)F2 interaction. In the first case we obtain the strong limit fa≳1016GeV on the decay constant. In the second case, specific choices of the function f (φ) can lead to a non-gaussianity with a characteristic shape not encountered in standard models of scalar field inflation, and which has also been constrained by Planck.
Original language | English (US) |
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Title of host publication | Workshop on Dark Matter, Neutrino Physics and Astrophysics, CETUP* 2013 - 7th International Conference on Interconnections between Particle Physics and Cosmology, PPC* 2013 |
Publisher | American Institute of Physics Inc. |
Pages | 429-435 |
Number of pages | 7 |
Volume | 1604 |
ISBN (Print) | 9780735412385 |
DOIs | |
State | Published - Jan 1 2014 |
Event | Workshop on Dark Matter, Neutrino Physics and Astrophysics, CETUP* 2013 and 7th International Conference on Interconnections Between Particle Physics and Cosmology, PPC* 2013 - Lead/Deadwood, SD, United States Duration: Jun 24 2013 → Jul 26 2013 |
Other
Other | Workshop on Dark Matter, Neutrino Physics and Astrophysics, CETUP* 2013 and 7th International Conference on Interconnections Between Particle Physics and Cosmology, PPC* 2013 |
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Country | United States |
City | Lead/Deadwood, SD |
Period | 6/24/13 → 7/26/13 |
Keywords
- Inflation
- Non-Gaussianity
- Planck