120 citations · 310 across the 11 of their papers we have counts for
11 papers
Constraints on Resonant Particle Production during Inflation from the Matter and CMB Power Spectra
G. J. Mathews, D. J. H. Chung, K. Ichiki +2
We analyze the limits on resonant particle production during inflation based upon the power spectrum of fluctuations in matter and the cosmic microwave background. We show that suc…
New Classes of Cosmic Energy and Primordial Black-Hole Formation
K. Ichiki, M. Orito, T. Kajino
It has recently been suggested that the formation of horizon-size primordial black hole (PBH) from pre-existing density fluctuations is effective during the cosmic QCD phase transi…
Constraints on Neutrino Degeneracy from the Cosmic Microwave Background and Primordial Nucleosynthesis
M. Orito, T. Kajino, G. J. Mathews +1
We reanalyze the cosmological constraints on the existence of a net universal lepton asymmetry and neutrino degeneracy based upon the latest high resolution CMB sky maps from BOOME…
Observational Constraints on Dark Radiation in Brane Cosmology
K. Ichiki, M. Yahiro, T. Kajino +2
We analyze the observational constraints on brane-world cosmology whereby the universe is described as a three-brane embedded in a five-dimensional anti-de Sitter space. In this br…
Universal Lepton Asymmetry: New Constraints from the Cosmic Microwave Background and Primordial Nucleosynthesis
T. Kajino, M. Orito, G. J. Mathews +1
We study the primordial nucleosynthesis and cosmic age in the presence of a net lepton asymmetry as well as baryon asymmetry. We explore a previously unnoted region of the paramete…
Constraints on Cosmic Quintessence and Quintessential Inflation
M. Yahiro, G. J. Mathews, K. Ichiki +2
Recently, attempts have been made to understand the apparent near coincidence of the present dark energy and matter energy in terms of a dynamical attractor-like solution for the e…