Gravitational-Wave Mediated Preheating
arXiv:1405.4288 · doi:10.1016/j.physletb.2015.02.018
Abstract
We propose a new preheating mechanism through the coupling of the gravitational field to both the inflaton and matter fields, without direct inflaton-matter couplings. The inflaton transfers power to the matter fields through interactions with gravitational waves, which are exponentially enhanced due to an inflation-graviton coupling. One such coupling is the product of the inflaton to the Pontryagin density, as in dynamical Chern-Simons gravity. The energy scales involved are constrained by requiring that preheating happens fast during matter domination.
6 pages, 2 figures
References in corpus (8)
- The Standard Model Higgs boson as the inflaton
- Effective Field Theory for Inflation
- A Natural Framework for Chaotic Inflation
- Dynamical Chern-Simons Modified Gravity I: Spinning Black Holes in the Slow-Rotation Approximation
- The Barbero-Immirzi Parameter as a Scalar Field: K-Inflation from Loop Quantum Gravity?
- Testing gravitational parity violation with coincident gravitational waves and short gamma-ray bursts
- A gravitational-wave probe of effective quantum gravity
- Interaction of the Barbero--Immirzi Field with Matter and Pseudo-Scalar Perturbations