The data from the new study radically narrows the range of potential masses for
The results show that dark matter cannot be "ultra-light" or "super-heavy" if it is not acted upon by a force that has not yet been discovered.
Scientists used the assumption thatthe only force acting on dark matter is gravity, and has calculated that dark matter particles should have a mass between 10-3 eV to 107 eV. This is a much narrower range than the usually assumed spectrum of 10-24 eV - 1019 GeV.
What makes the discovery even more significant?If it turns out that the mass of dark matter is outside the range predicted by the team at the University of Sussex, this will prove that it is subject to additional force, as well as gravity.
This research will help physicists.First, it focuses the search area for dark matter, and second, it can potentially help reveal if there is a mysterious unknown additional force in the universe.
Professor Xavier Calmet, School of Mathematical and Physical Sciences, University of Sussex
The visible universe - planets and stars - is25% of the entire mass of the Universe. The remaining 75% is dark matter. This is a form of matter that does not participate in electromagnetic interaction and therefore is inaccessible to direct observation. It is about a quarter of the mass-energy of the Universe and manifests itself only in gravitational interaction.
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Electron volt (electron volt, rarelyelectron volt; Russian designation: eV, international: eV) is a non-systemic unit of energy used in atomic and nuclear physics, in elementary particle physics and in related and related fields of science (biophysics, physical chemistry, astrophysics, etc.).
The energies in the world of elementary particles are also too small to be measured in Joules. Instead, use a unit of energy electron-volt (eV). 1 eV, by definition, is the energy that an electron will acquire in an electric field when it passes a potential difference of 1 volt. 1 eV is approximately equal to 1.6 · 10-19 J.