Results 21 to 30 of about 21,978 (196)
Non-Abelian Einstein-Born-Infeld-Dilaton Cosmology [PDF]
, 2005 The non-abelian Einstein-Born-Infeld-Dilaton theory, which rules the dynamics of tensor-scalar gravitation coupled to a $su(2)$-valued gauge field ruled by Born-Infeld lagrangian, is studied in a cosmological framework.
Alimi, J. -M., Fuzfa, A.
core +7 more sources
Limits from BBN on light electromagnetic decays
Journal of High Energy Physics, 2019 Injection of electromagnetic energy — photons, electrons, or positrons — into the plasma of the early universe can destroy light elements created by primordial Big Bang Nucleosynthesis (BBN).
Lindsay Forestell +2 more
doaj +1 more source
Hidden dark matter from Starobinsky inflation
Journal of High Energy Physics, 2021 The Starobinsky inflation model is one of the simplest inflation models that is consistent with the cosmic microwave background observations. In order to explain dark matter of the universe, we consider a minimal extension of the Starobinsky inflation ...
Qiang Li +3 more
doaj +1 more source
DAMPE electron-positron excess in leptophilic Z′ model
Journal of High Energy Physics, 2018 Recently the DArk Matter Particle Explorer (DAMPE) has reported an excess in the electron-positron flux of the cosmic rays which is interpreted as a dark matter particle with the mass about 1.5 TeV.
Karim Ghorbani, Parsa Hossein Ghorbani
doaj +1 more source
On chirality of the vorticity of the Universe [PDF]
, 2012 We study chirality of the vorticity of the Universe within the Einstein-Cartan cosmology. The role of the spin of fermion species during the evolution of the Universe is studied by averaged spin densities and Einstein-Cartan equations.
Palle, Davor
core +3 more sources
Improved bounds on ℤ3 singlet dark matter
Journal of High Energy Physics, 2019 We reconsider complex scalar singlet dark matter stabilised by a ℤ3 symmetry. We refine the stability bounds on the potential and use constraints from unitarity on scattering at finite energy to place a stronger lower limit on the direct detection cross ...
A. Hektor, A. Hryczuk, K. Kannike
doaj +1 more source
Particle production from oscillating scalar field and consistency of Boltzmann equation
Journal of High Energy Physics, 2021 Boltzmann equation plays important roles in particle cosmology in studying the evolution of distribution functions (also called as occupation numbers) of various particles.
Takeo Moroi, Wen Yin
doaj +1 more source
Monochromatic Gamma Rays from Dark Matter Annihilation to Leptons [PDF]
, 2015 We investigate the relation between the annihilation of dark matter (DM) particles into lepton pairs and into 2-body final states including one or two photons.
Coogan, Adam +2 more
core +2 more sources
Forbidden frozen-in dark matter
Journal of High Energy Physics, 2019 We examine and point out the importance of a regime of dark matter pro- duction through the freeze-in mechanism that results from a large thermal correction to a decaying mediator particle mass from hot plasma in the early Universe. We show that mediator
L. Darmé +3 more
doaj +1 more source
Gravitational waves from supercool axions
Journal of High Energy Physics, 2020 We study the dynamics of the Peccei-Quinn (PQ) phase transition for the QCD axion. In weakly coupled models the transition is typically second order except in the region of parameters where the PQ symmetry is broken through the Coleman-Weinberg mechanism.
Luigi Delle Rose +3 more
doaj +1 more source