Results 11 to 20 of about 945 (139)
Bound states of WIMP dark matter in Higgs-portal models. Part II. Thermal decoupling
Journal of High Energy Physics, 2021 The Higgs doublet can mediate a long-range interaction between multi-TeV particles coupled to the Weak interactions of the Standard Model, while its emission can lead to very rapid bound-state formation processes and bound-to-bound transitions. Using the
Ruben Oncala, Kalliopi Petraki
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Unification of the standard model and dark matter sectors in [SU(5) × U(1)]4
Journal of High Energy Physics, 2019 A simple model of dark matter contains a light Dirac field charged under a hidden U(1) gauge symmetry. When a chiral matter content in a strong dynamics satisfies the t’Hooft anomaly matching condition, a massless baryon is a natural candidate of the ...
Ayuki Kamada +2 more
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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
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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
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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
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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
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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
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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
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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
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Model-independent analysis of the DAMPE excess
Journal of High Energy Physics, 2018 The Dark Matter Particle Explorer (DAMPE) recently released measurements of the electron spectrum with a hint of a narrow peak at about 1.4 TeV. We investigate dark matter (DM) models that could produce such a signal by annihilation in a nearby subhalo ...
Peter Athron +3 more
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