Results 11 to 20 of about 242,972 (318)
Physical Review D, 2021 A new $U(1)$ dark gauge group coupled to the Standard Model (SM) via the kinetic mixing portal provides a natural dark matter candidate in the form of the Higgs field, $h_d$, responsible for generating the mass of the dark photon, $ _d$. We show that the condition $m_{h_d}\leq m_{ _d}$, together with smallness of the kinetic mixing parameter ...
Maxim Pospelov +4 more
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Dark matter and dark radiation [PDF]
Physical Review D, 2009 14 pages, 6 figures Updated equations and ...
Ackerman, Lotty +3 more
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The Identification of Dark Matter, 2000 Abstract: The late infall of cold dark matter onto an isolated galaxy such as our own produces flows with definite velocity vectors at any physical point in the galactic halo. It also produces caustics which are places where the dark matter density is very large. The outer caustics are topological spheres whereas the inner caustics are rings. The self‐
Pierre Sikivie, William H. Kinney
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Brazilian Journal of Physics, 2011 Abstract I give a review of the development of the concept of dark matter. The dark matter story passed through several stages from a minor observational puzzle to a major challenge for theory of elementary particles. Modern data suggest that dark matter is the dominant matter component in the Universe, and that it consists of some ...
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Modified dark matter: Relating dark energy, dark matter and baryonic matter [PDF]
International Journal of Modern Physics D, 2018 Modified dark matter (MDM) is a phenomenological model of dark matter, inspired by gravitational thermodynamics. For an accelerating universe with positive cosmological constant ([Formula: see text]), such phenomenological considerations lead to the emergence of a critical acceleration parameter related to [Formula: see text].
Y. Jack Ng +5 more
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Proceedings of the National Academy of Sciences, 2014 The evidence for the dark matter (DM) of the hot big bang cosmology is about as good as it gets in natural science. The exploration of its nature is now led by direct and indirect detection experiments, to be complemented by advances in the full range of cosmological tests, including judicious consideration of the rich phenomenology of galaxies.
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Journal of High Energy Physics, 2014 We study a phenomenological model where the lightest dark matter (DM) particles are the pseudo-Goldstone excitations associated with a spontaneously broken symmetry, and transforming linearly with respect to an unbroken group H. For definiteness we take H = SU(N) and assume the Goldstone particles are bosons; in parallel with QCD, we refer to these ...
Bhattacharya, Subhaditya +2 more
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Physical Review D, 2019 We highlight a new connection between the Standard Model hierarchy problem and the dark matter sector. The key piece is the relaxion field, which besides scanning the Higgs mass and setting the electroweak scale, also constitutes the observed dark matter abundance of the universe. The relaxation mechanism is realized during inflation, and the necessary
Fonseca, Nayara, Morgante, Enrico
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Journal of High Energy Physics, 2020 Abstract We suggest that an interplay between microscopic and macroscopic physics can give rise to dark matter (DM) whose interactions with the visible sector fundamentally undulate in time, independent of celestial dynamics.
Matthew McCullough +3 more
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