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Autor:
Betty X. Hu, Abraham Loeb
Gravitational waves (GWs) are produced by colliding particles through the gravitational analogue of electromagnetic bremsstrahlung. We calculate the contribution of free-free emission in the radiation-dominated Universe to the stochastic GW backgroun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3fe16222320206e8450b9ecbbac9479
http://arxiv.org/abs/2004.02895
http://arxiv.org/abs/2004.02895
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
Journal of Cosmology and Astroparticle Physics
instname
Journal of Cosmology and Astroparticle Physics
Although weakly interacting massive particles (WIMPs) have long been among the most studied and theoretically attractive classes of candidates for the dark matter of our universe, the lack of their detection in direct detection and collider experimen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e71df6f9cfa8bf9a4d5744e1b6ec7e1
http://hdl.handle.net/10261/207257
http://hdl.handle.net/10261/207257
Autor:
Alejandro Ibarra, Johannes Herms
We consider a scenario where the dark sector includes two Feebly Interacting Massive Particles (FIMPs), with couplings to the Standard Model particles that allow their production in the Early Universe via thermal freeze-in. These couplings genericall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5107d36e2f8afc793dcaa82b4fbc4c92
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 5 (2018)
The current central experimental values of the parameters of the Standard Model give rise to a striking conclusion: metastability of the electroweak vacuum is favoured over absolute stability. A metastable vacuum for the Higgs boson implies that it i
Autor:
Nick E. Mavromatos, Rafael Yunis, A. Krut, Jorge A. Rueda, M. Carinci, Ángeles Moliné, Carlos R. Argüelles, Remo Ruffini
Publikováno v:
Physics of the Dark Universe. 30:100699
The neutrino minimal standard model ($\nu$MSM) has been tightly constrained in the recent years, either from dark matter (DM) production or from X-ray and small-scale observations. However, current bounds on sterile neutrino DM can be significantly m
Publikováno v:
Journal of cosmology and astroparticle physics 2007(07), 016-016 (2020). doi:10.1088/1475-7516/2020/07/016
Journal of cosmology and astroparticle physics 2007(07), 016 - 016 (2020). doi:10.1088/1475-7516/2020/07/016
Unstable heavy particles well above the TeV scale are unaccessible experimentally. So far, Big-Bang Nucleosynthesis (BBN) provides the s
Unstable heavy particles well above the TeV scale are unaccessible experimentally. So far, Big-Bang Nucleosynthesis (BBN) provides the s
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2020:058-058
If neutrinos are Dirac particles the existence of light right-handed neutrinos νR is implied. Those would contribute to the effective number of relativistic neutrino species Neff in the early Universe. With pure standard model interactions, the cont
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2019:062-062
We consider a particle dark matter model by extending the scalar sector of the Standard Model by an additional SU(2) scalar doublet which is made "inert" (and stable) by imposing a discrete $Z_2$ symmetry under which the additional scalar doublet is
Publikováno v:
Journal of Cosmology and Astroparticle Physics
We study the generation of intergalactic magnetic fields in two models for first-order phase transitions in the early Universe that have been studied previously in connection with the generation of gravitational waves (GWs): the Standard Model supple
We study the cosmological evolution and phenomenological properties of scalar bosons in the keV to MeV range that have a tiny mixing with the Standard Model Higgs boson. The mixing determines both the abundance of light scalars produced via the freez
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bdb22649cd78f985e8b43a4eb07c3c0a