منابع مشابه
Inflation and Mixed Dark Matter Models
Recent large scale structure observations, including COBE, have prompted many authors to discuss modifications of the standard Cold Dark Matter model. Two of these, a tilted spectrum and a gravitational wave contribution to COBE, are at some level demanded by theory under the usual assumption that inflation generates the primeval perturbations. The third, whose motivation comes by contrast from...
متن کاملSimplified models of mixed dark matter
We explore simplified models of mixed dark matter (DM), defined here to be a stable relic composed of a singlet and an electroweak charged state. Our setup describes a broad spectrum of thermal DM candidates that can naturally accommodate the observed DM abundance but are subject to substantial constraints from current and upcoming direct detection experiments. We identify “blind spots” at whic...
متن کاملSuperheavy Dark Matter and Thermal Inflation
The thermal inflation is the most plausible mechanism that solves the cosmological moduli problem naturally. We discuss relic abundance of superheavy particle X in the presence of the thermal inflation assuming that its lifetime is longer than the age of the universe, and show that the long-lived particle X of mass 1012–1014 GeV may form a part of the dark matter in the present universe in a wi...
متن کاملUnified Model for Inflation and Dark Matter
Abstract We present a model which contains a new complex scalar field Ψ, interacting with a new real scalar field, χ, and an effective potential whose symmetry is almost exact, being explicitly broken by Planck-scale effects. We study the possibility of relating inflation with the dark matter of the universe. We find that for exponentially small explicit breaking, the model accounts for a perio...
متن کاملNeutrino Mass, Dark Matter and Inflation
We show that spontaneous breaking of global B − L symmetry responsible for small neutrino masses via the seesaw mechanism provides a unified picture of hybrid inflation and dark matter if the scale of B − L breaking is close to the GUT scale. The majoron which acquires a small mass in the milli-eV range due to Planck scale breaking of B − L is the dark matter candidate. The coupling of the majo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1993
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/265.2.379