"Fundamental physics with ultra-cold neutrons at the FRM-2."

"Ultra-cold neutrons (UCN) are a unique tool to measure fundamental properties of nature. Due to the neutron’s comparably simple composition, it is also a favored system to perform searches for a permanent electric dipole moment (EDM) of a fundamental system that violates time reversal symmetry. Such a phenomenon is required in most theories in particle physics to explain the excess of matter versus antimatter in the Universe, a problem which the standard model of particle physics fails to explain by eight orders of magnitude. The search for EDMs is already ongoing for many years in different systems and has already ruled out or restricted many theories and already probes energy scales beyond the LHC. In this talk I will give an overview of the research with such very slow neutrons and focus on a new flagship experiment that is currently being set up at the FRM-2 reactor in Garching to measure the neutron EDM with a sensitivity of 10-28 e.cm. This corresponds to a larger than a factor 100 improvement, which requires next to the strongest possible source of UCN also an elaborate effort to control systematic effects in small magnetic and electric fields."