Physikalisches Kolloquium

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Kirchhoff-Institut für Physik, Otto-Haxel-Hörsaal
Friday 17:15

6.12.2019 17:00
Prof. Guy D. Moore, Institut für Kernphysik, TU Darmstadt
KIP, INF 227, Otto-Haxel-Hörsaal

First I will review the evidence that the Universe is full of dark matter, which outweighs ordinary neutron-proton-electron matter by a factor of 5. Then I will present a seemingly unrelated issue: the strong interactions respect time-reversal invariance, even though they could easily violate this symmetry a billion times more strongly. A hypothetical particle, the Axion, could explain both puzzles. I discuss the physics of the Axion in the early Universe, leading to a prediction for this particle's mass if it makes up the Dark Matter.