Abstract
An electric dipole moment (EDM) of the neutron would be a clear sign of new physics beyond the standard model of particle physics. The search for this phenomenon is considered one of the most important experiments in fundamental physics and could provide key information on the excess of matter versus antimatter in the universe. With high measurement precision, this experiment aims to ultimately achieve a sensitivity of 10-28 ecm, a 100-fold improvement in the sensitivity compared to the state-of-the-art. The EDM instrument is operated by an international collaboration based at the Technische Universität München.
Highlights
The electric dipole moment of the neutron can be interpreted as a probe to investigate the evolution of the early Universe, less than 10-11 s after the big bang and complementary to experiments at CERN and beyond the reach of accelerator experiments
In the Neutron Guide Hall East, a new instrument to search for the neutron electric dipole moment (EDM) is currently being commissioned (Altarev, Chesnevskaya, et al, 2012)
The EDM experiment is based on a Ramsey resonance measurement applied to trapped ultra-cold neutrons (UCN) in the simultaneous presence of strong electrostatic elds
Summary
The electric dipole moment of the neutron can be interpreted as a probe to investigate the evolution of the early Universe, less than 10-11 s after the big bang and complementary to experiments at CERN and beyond the reach of accelerator experiments. In the Neutron Guide Hall East, a new instrument to search for the neutron EDM is currently being commissioned (Altarev, Chesnevskaya, et al, 2012). The EDM experiment is based on a Ramsey resonance measurement applied to trapped ultra-cold neutrons (UCN) in the simultaneous presence of strong electrostatic elds.
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