Possible signatures of the inflationary particle content: spin-2 fields

Journal Article · Sun Oct 01 00:00:00 EDT 2017 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2017/10/038· OSTI ID:22667627

Biagetti, Matteo ^[1]; Dimastrogiovanni, Emanuela ^[2]; Fasiello, Matteo ^[3]

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1. Institute of Physics, Universiteit van Amsterdam, Science Park, Amsterdam, 1098XH The Netherlands (Netherlands)
2. CERCA and Department of Physics, Case Western Reserve University, Cleveland, OH, 44106 (United States)
3. Stanford Institute for Theoretical Physics and Department of Physics, Stanford University, Stanford, CA, 94306 (United States)

We study the imprints of a massive spin-2 field on inflationary observables, and in particular on the breaking of consistency relations. In this setup, the minimal inflationary field content interacts with the massive spin-2 field through dRGT interactions, thus guaranteeing the absence of Boulware-Deser ghostly degrees of freedom. The unitarity requirement on spinning particles, known as Higuchi bound, plays a crucial role for the size of the observable signal.

• OSTI ID: 22667627
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COSMOLOGICAL INFLATION
DEGREES OF FREEDOM
INTERACTIONS
SPIN
UNITARITY