Results 21 to 30 of about 121,158 (269)
Quantum interference in gravitational particle production
Journal of High Energy Physics, 2022 Previous numerical investigations of gravitational particle production during the coherent oscillation period of inflation displayed unexplained fluctuations in the spectral density of the produced particles.
Edward Basso +3 more
doaj +1 more source
Early Universe models from Noncommutative Geometry [PDF]
, 2009 We investigate cosmological predictions on the early universe based on the noncommutative geometry models of gravity coupled to matter. Using the renormalization group analysis for the Standard Model with right handed neutrinos and Majorana mass terms ...
Marcolli, Matilde, Pierpaoli, Elena
core +2 more sources
Inflection-point inflation and dark matter redux
Journal of High Energy Physics, 2022 We investigate for viable models of inflation that can successfully produce dark matter (DM) from inflaton decay process, satisfying all the constraints from Cosmic Microwave Background (CMB) and from some other observations.
Anish Ghoshal +4 more
doaj +1 more source
Dark matter from Affleck-Dine baryogenesis [PDF]
, 1999 Fragmentation of the Affleck-Dine condensate into Q-balls could fill the Universe with dark matter either in the form of stable baryonic balls, or LSP produced from the decay of unstable Q-balls.
Kusenko, Alexander
core +3 more sources
Bubble nucleation and quantum initial conditions in classical statistical simulations
Journal of High Energy Physics, 2022 Classical-statistical lattice simulations provide a useful approximation to out-of-equilibrium quantum field theory, but only for systems exhibiting large occupation numbers, and only for phenomena that are not intrinsically quantum mechanical in nature.
Anders Tranberg, Gerhard Ungersbäck
doaj +1 more source
Axion as a non-WIMP dark matter candidate [PDF]
, 2017 The axion arises in well-motivated extensions of the Standard Model of particle physics and is regarded as an alternative to the weakly interacting massive particle paradigm to explain the nature of dark matter.
Saikawa, Ken'ichi
core +3 more sources
The Origin of Cosmic Magnetic Fields
, 2000 In this talk, I review a number of particle-physics models that lead to the creation of magnetic fields in the early universe and address the complex problem of evolving such primordial magnetic fields into the fields observed today.
Tornkvist, Ola
core +2 more sources
Boosted dark matter from primordial black holes produced in a first-order phase transition
Journal of High Energy Physics, 2023 During a cosmological first-order phase transition in a dark sector, fermion dark matter particles χ can form macroscopic Fermi balls that collapse to primordial black holes (PBHs) under certain conditions.
Danny Marfatia, Po-Yan Tseng
doaj +1 more source
First-Order Phase Transitions in an Early-Universe Environment [PDF]
, 2000 In first-order phase transitions in the early universe, the bubble wall is expected to be significantly slowed-down by its interaction with the surrounding plasma.
Lilley, Matthew
core +3 more sources
A Minimal Supersymmetric Model of Particle Physics and the Early Universe
, 2013 We consider a minimal supersymmetric extension of the Standard Model, with right-handed neutrinos and local B-L, the difference between baryon and lepton number, a symmetry which is spontaneously broken at the scale of grand unification. To a large extent, the parameters of the model are determined by gauge and Yukawa couplings of quarks and leptons ...
Buchmuller, W. +3 more
openaire +3 more sources