Reheating of the universe after inflation with f({phi})R gravity

Journal Article · Thu Mar 15 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.061301· OSTI ID:21020113

Watanabe, Yuki; Komatsu, Eiichiro ^[1]

---

1. Department of Physics, University of Texas, Austin, Texas 78712 (United States)

We show that reheating of the universe occurs spontaneously in a broad class of inflation models with f({phi})R gravity ({phi} is the inflaton). The model does not require explicit couplings between {phi} and bosonic or fermionic matter fields. The couplings arise spontaneously when {phi} settles in the vacuum expectation value (vev) and oscillates, with coupling constants given by derivatives of f({phi}) at the vev and the mass of resulting bosonic or fermionic fields. This mechanism allows inflaton quanta to decay into any fields which are not conformally invariant in f({phi})R gravity theories.

• OSTI ID: 21020113
• Journal Information: Physical Review. D, Particles Fields, Vol. 75, Issue 6; Other Information: DOI: 10.1103/PhysRevD.75.061301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
COSMOLOGY
COUPLING CONSTANTS
EXPECTATION VALUE
FERMIONS
GRAVITATION
INFLATIONARY UNIVERSE
PARTICLE DECAY
QUANTUM FIELD THEORY
REST MASS
UNIVERSE