Results 21 to 30 of about 20,902 (149)
Probing the pre-BBN universe with gravitational waves from cosmic strings
Journal of High Energy Physics, 2019 Many motivated extensions of the Standard Model predict the existence of cosmic strings. Gravitational waves originating from the dynamics of the resulting cosmic string network have the ability to probe many otherwise inaccessible properties of the ...
Yanou Cui +3 more
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Analytic study of dark photon and gravitational wave production from axion
Journal of High Energy Physics, 2021 Axion-like fields heavier than about 10 −27 eV are expected to oscillate in the radiation dominated epoch when the Hubble parameter drops below their mass.
Borna Salehian +3 more
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On the evolution process of two-component dark matter in the Sun
Journal of High Energy Physics, 2018 We introduce dark matter (DM) evolution process in the Sun under a two-component DM (2DM) scenario. Both DM species χ and ξ with masses heavier than 1 GeV are considered.
Chian-Shu Chen, Yen-Hsun Lin
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Strong dark matter self-interaction from a stable scalar mediator
Journal of High Energy Physics, 2020 In face of the small-scale structure problems of the collisionless cold dark matter (DM) paradigm, a popular remedy is to introduce a strong DM self-interaction which can be generated nonperturbatively by a MeV-scale light mediator.
Mateusz Duch +2 more
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Journal of High Energy Physics, 2021 In traditional models only an order one fraction of energy is transferred from the inflaton to radiation through nonperturbative resonance production in preheating immediately after inflation, due to backreaction effects. We propose a particle production
JiJi Fan, Kaloian D. Lozanov, Qianshu Lu
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Boosted dark matter quarrying at surface neutrino detectors
Journal of High Energy Physics, 2018 We propose the idea of “Earth Shielding” to reject cosmic-ray backgrounds, in the search for boosted dark matter at surface neutrino detectors, resulting in the enhancement of the signal-to-background ratio.
Doojin Kim +3 more
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Thermal QCD Axions across Thresholds
Journal of High Energy Physics, 2021 Thermal axion production in the early universe goes through several mass thresholds, and the resulting rate may change dramatically across them. Focusing on the KSVZ and DFSZ frameworks for the invisible QCD axion, we perform a systematic analysis of ...
Francesco D’Eramo +2 more
doaj +1 more source
Polynomial $f(R)$ Palatini cosmology -- dynamical system approach
, 2017 We investigate cosmological dynamics based on $f(R)$ gravity in the Palatini formulation. In this study we use the dynamical system methods. We show that the evolution of the Friedmann equation reduces to the form of the piece-wise smooth dynamical ...
Stachowski, Aleksander +1 more
core +1 more source
Gravitino dark matter in brane-world cosmology [PDF]
, 2007 The gravitino dark matter hypothesis in the brane cosmology is studied. The theoretical framework is the CMSSM for particle physics and RS II brane model for gravity.
Aliev A N +18 more
core +3 more sources
Axion global fits with Peccei-Quinn symmetry breaking before inflation using GAMBIT
Journal of High Energy Physics, 2019 We present global fits of cosmologically stable axion-like particle and QCD axion models in the mass range 0.1 neV to 10 eV. We focus on the case where the Peccei-Quinn symmetry is broken before the end of inflation, such that the initial value of the ...
Sebastian Hoof +4 more
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