smolyaninov, igor i.

In the Newtonian limit of general relativity a force acting on a test mass in a central gravitational field is conventionally defined by the attractive Newtonian gravity (inverse square) term plus a small repulsive cosmological force, which is proportional to the slow acceleration of the universe expansion. In this paper we considered the cosmologi...

Ramanah, Doogesh Kodi Charnock, Tom Villaescusa-Navarro, Francisco Wandelt, Benjamin D.

We present an extension of our recently developed Wasserstein optimized model to emulate accurate high-resolution features from computationally cheaper low-resolution cosmological simulations. Our deep physical modelling technique relies on restricted neural networks to perform a mapping of the distribution of the low-resolution cosmic density fiel...

Beltrán Jiménez, Jose Bettoni, Dario Brax, Philippe

We consider cosmological models where dark matter is charged under a dark Abelian gauge field. This new interaction is repulsive and competes with gravity on large scales and in the dynamics of galaxies and clusters. We focus on non-linear models of dark electrodynamics where the effects of the new force are screened within a K-mouflage radius that...

sofue, yoshiaki

We show that the Earth acts as a high-efficiency gravitational collector of low-velocity flow of dark matter (DM). The focal point appears on the Earth&rsquo / s surface, when the DM flow speed is about 17 km/s with respect to the geo-center. We discuss diurnal modulation of the local DM density influenced by the Earth&rsquo / s gravity. We also to...

Delmas-Rigoutsos, Yannis

This article suggests a new quantum mechanical framework to investigate the relations between space-time and particles. First, we introduce a formal framework to deal with possible worlds, we say potential worlds, independent of interpretations: the quantical modal logic. This framework is compatible but simpler than multiple-world and pilot-wave i...

gazeau, jean-pierre

An explanation of the origin of dark matter is suggested in this work. The argument is based on symmetry considerations about the concept of mass. In Wigner&rsquo / s view, the rest mass and the spin of a free elementary particle in flat space-time are the two invariants that characterize the associated unitary irreducible representation of the Poi...

Chacko, Zackaria Dev, Abhish Du, Peizhi Poulin, Vivian Tsai, Yuhsin
Published in
Journal of High Energy Physics

At present, the strongest upper limit on ∑mν, the sum of neutrino masses, is from cosmological measurements. However, this bound assumes that the neutrinos are stable on cosmological timescales, and is not valid if the neutrino lifetime is less than the age of the universe. In this paper, we explore the cosmological signals of theories in which the...

mcgaugh, stacy

A review is given of a priori predictions made for the dynamics of rotating galaxies. One theory&mdash / MOND&mdash / has had many predictions corroborated by subsequent observations. While it is sometimes possible to offer post hoc explanations for these observations in terms of dark matter, it is seldom possible to use dark matter to predict the ...

sipols, alan pavlovich, alex

The aim of this paper is to test the need for non-baryonic dark matter in the context of galactic rotation and the apparent difference between distributions of galactic mass and luminosity. We present a set of rotation curves and 3.6 &mu / m surface brightness profiles for a diverse sample of 214 galaxies. Using rotation curves as the sole input in...

Zhao, Li Liu, Jianglai
Published in
Frontiers of Physics

The nature of dark matter is one of the greatest mysteries in modern physics and astronomy. A wide variety of experiments have been carried out worldwide to search for the evidence of particle dark matter. Chinese physicists started experimental search for dark matter about ten years ago, and have produced results with high scientific impact. In th...