Results 41 to 50 of about 21,702 (168)
Detecting dark photons from atomic rearrangement in the galaxy
Journal of High Energy Physics, 2021 We study a new dark sector signature for an atomic process of “rearrangement” in the galaxy. In this process, a hydrogen-like atomic dark matter state together with its anti-particle can rearrange to form a highly-excited bound state.
James Eiger, Michael Geller
doaj +1 more source
Can Dark Matter be an artifact of extended theories of gravity?
, 2016 In this article, we propose different background models of extended theories of gravity, which are minimally coupled to the SM fields, to explain the possibility of genesis of dark matter without affecting the SM particle sector.
Choudhury, Sayantan +2 more
core +1 more source
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract The MIST experiment aims to detect the cosmological 21‐cm signal through sky observations at 25–125 MHz using a wide‐beam antenna. The antenna is mounted above the soil and the beam characteristics are highly dependent on the soil's electrical properties.
I. Hendricksen +15 more
wiley +1 more source
Split fermionic WIMPs evade direct detection
Journal of High Energy Physics, 2018 We consider a model with two gauge singlet fermionic WIMPs communicating with the SM particles by a singlet scalar mediator via a Higgs portal. While the light WIMP is stable and plays the role of the dark matter (DM) candidate, the heavy partner is a ...
Karim Ghorbani
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Gauge boson signals at the cosmological collider
Journal of High Energy Physics, 2020 We study the production of massive gauge bosons during inflation from the axion-type coupling to the inflaton and the corresponding oscillatory features in the primordial non-Gaussianity.
Lian-Tao Wang, Zhong-Zhi Xianyu
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Evolution of Ionospheric Ion Upflow Flux During the April 2023 Geomagnetic Storm
Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.Abstract We study the impact of the evolving magnetosphere‐ionosphere‐thermosphere system on upward ion fluxes during the 23–24 April 2023 geomagnetic storm. This storm has a “double‐dip” structure where two southward IMF Bz ${\mathrm{B}}_{z}$ periods cause two dips in the SYM‐H index.
Grace Kwon +4 more
wiley +1 more source
Constraints on light Dark Matter fermions from relic density consideration and Tsallis statistics
Journal of High Energy Physics, 2018 The cold dark matter fermions with mass MeV scale, pair produced inside the supernova SN1987A core, can freely stream away from the supernovae and hence contributes to its energy loss rate.
Atanu Guha, Prasanta Kumar Das
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A multi-temperature universe can allow a sub-MeV dark photon dark matter
Journal of High Energy Physics, 2021 An analysis of sub-MeV dark photon as dark matter is given which is achieved with two hidden sectors, one of which interacts directly with the visible sector while the second has only indirect coupling with the visible sector.
Amin Aboubrahim +3 more
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Physics of the linear collider
, 2003 This presentation intends to illustrate the specific capabilities of an e$^+$e$^-$ sub-TeV collider to provide answers on the basic issues in physics: origin of mass, hierarchy of masses, cosmological problems.
F. RICHARD, Rizzo T. G.
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Cosmological constraints on deviations from Lorentz invariance in gravity and dark matter [PDF]
, 2014 We consider a scenario where local Lorentz invariance is violated by the existence of a preferred time direction at every space-time point. This scenario can arise in the context of quantum gravity and its description at low energies contains a unit time-
Audren, B. +4 more
core +3 more sources