CMB non-gaussianity from vector fields

Marco Peloso

doi:10.1063/1.4883461

CMB non-gaussianity from vector fields

Marco Peloso

Physics and Astronomy (Twin Cities)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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 f_a≳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)
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	https://doi.org/10.1063/1.4883461
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
Country	United States
City	Lead/Deadwood, SD
Period	6/24/13 → 7/26/13

Keywords

Inflation
Non-Gaussianity
Planck

Access

10.1063/1.4883461

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Cite this

CMB non-gaussianity from vector fields. / Peloso, Marco.

Workshop on Dark Matter, Neutrino Physics and Astrophysics, CETUP* 2013 - 7th International Conference on Interconnections between Particle Physics and Cosmology, PPC* 2013. Vol. 1604 American Institute of Physics Inc., 2014. p. 429-435.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Peloso, M 2014, CMB non-gaussianity from vector fields. in Workshop on Dark Matter, Neutrino Physics and Astrophysics, CETUP* 2013 - 7th International Conference on Interconnections between Particle Physics and Cosmology, PPC* 2013. vol. 1604, American Institute of Physics Inc., pp. 429-435, 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, 6/24/13. https://doi.org/10.1063/1.4883461

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