Superluminal particles as dark matter candidates

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

Present low-energy bounds on Lorentz symmetry violation do not allow to exclude the possible existence of superluminal particles with critical speed in vacuum c_i gg ~c (c = 3D speed of light) whose kinematical properties would be close to those of "ordinary" particles (particles with critical speed in vacuum equal to c) apart from the difference in critical speed. If they exist, such particles (superbradyons) may be the basic building blocks of vacuum and matter at Planck scale, provide most of the matter in the Universe and be natural dark matter candidates. We discuss such cosmological scenarios, as well as problems related to the detection of superluminal dark matter particles.

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