Results 91 to 100 of about 19,573 (204)
The inflaton portal to dark matter
Journal of High Energy Physics, 2017 We consider the possibility that the inflaton is part of the dark sector and interacts with the standard model through a portal interaction with a heavy complex scalar field in equilibrium with the standard model at high energies.
Lucien Heurtier
doaj +1 more source
Violent Preheating in Inflation with Nonminimal Coupling
, 2017 We study particle production at the preheating era in inflation models with nonminimal coupling $\xi \phi^2R$ and quartic potential $\lambda \phi^4/4$ for several cases: real scalar inflaton, complex scalar inflaton and Abelian Higgs inflaton.
Ema, Yohei +3 more
core +1 more source
Clockwork inflation with non-minimal coupling
European Physical Journal C: Particles and Fields, 2019 We suggest a clockwork mechanism for a Higgs-like inflation with the non-minimal coupling term $$\xi \phi ^2 R$$ ξϕ2R . The seemingly unnatural ratio of parameters, $$\lambda /\xi ^2 \sim 10^{-10}$$ λ/ξ2∼10-10 of the self quartic coupling of the inflaton,
Seong Chan Park, Chang Sub Shin
doaj +1 more source
Non-thermal production of pNGB dark matter and inflation
Journal of High Energy Physics, 2021 A pseudo Nambu-Goldstone boson (pNGB) is a natural candidate of dark matter in that it avoids the severe direct detection bounds. We show in this paper that the pNGB has another different and interesting face with a higher symmetry breaking scale.
Yoshihiko Abe +2 more
doaj +1 more source
The Chaotic Regime of D-Term Inflation
, 2014 We consider D-term inflation for small couplings of the inflaton to matter fields. Standard hybrid inflation then ends at a critical value of the inflaton field that exceeds the Planck mass.
Buchmuller, W., Domcke, V., Schmitz, K.
core +1 more source
Towards universal axion inflation and reheating in string theory
Physics Letters B, 2014 The recent BICEP2 measurements of B-modes indicate a large tensor-to-scalar ratio in inflationary cosmology, which points towards trans-Planckian evolution of the inflaton. We propose possible string-theory realizations thereof.
Ralph Blumenhagen, Erik Plauschinn
doaj +1 more source
Pre-thermalized gravitational waves
Journal of High Energy PhysicsWe investigate a novel gravitational wave (GW) production mechanism from gravitons generated during the pre-thermal phase of cosmic reheating, where the energy density is dominated by non-thermalized inflaton decay products, dubbed reheatons. We consider
Nicolás Bernal +3 more
doaj +1 more source
Energy-Momentum Tensor of Field Fluctuations in Massive Chaotic Inflation [PDF]
, 2001 We study the renormalized energy-momentum tensor (EMT) of the inflaton fluctuations in rigid space-times during the slow-rollover regime for chaotic inflation with a mass term.
A. A. Starobinsky +37 more
core +4 more sources
Inflation with Massive Vector Fields
, 2015 We investigate the coupling between the inflaton and massive vector fields. All renormalizable couplings with shift symmetry of the inflaton are considered. The massive vector can be decomposed into a scalar mode and a divergence-free vector mode.
Liu, Junyu, Wang, Yi, Zhou, Siyi
core +2 more sources
The Inflaton Portal to a Highly decoupled EeV Dark Matter Particle [PDF]
, 2019 We explore the possibility that the dark-matter relic abundance is generated in a context where the inflaton is the only mediator between the visible and the hidden sectors of our universe.
Heurtier, Lucien, Huang, Fei
core +2 more sources