SMuK 2023 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 33: Fundamental Symmetries I

HK 33.4: Talk

Wednesday, March 22, 2023, 15:15–15:30, SCH/A252

The Search for Electric Dipole Moments of Charged Particles in Storage Rings — •Achim Andres for the JEDI collaboration — Institute for Nuclear Physics IV, FZ Jülich, Germany — III. Physikalisches Institut B, RWTH Aachen University, Germany

The matter-antimatter asymmetry in the universe cannot be explained by the Standard Model of elementary particle physics. According to A. Sakharov CP violating phenomena are needed in order to understand the matter-antimatter asymmetry. Permanent Electric Dipole Moments (EDMs) of subatomic elementary particles violate both time reversal and parity asymmetries and therefore also violate CP if the CPT-theorem holds. Storage rings offer the possibility to measure EDMs of charged particles by observing the influence of the EDM on the spin motion. The Cooler Synchrotron (COSY) at Forschungszentrum Jülich provides polarized protons and deuterons up to a momenta of 3.7 GeV/c and is therefore an ideal starting point for the JEDI - Collaboration (Jülich Electric Dipole moment Investigations) to perform the first direct measurement of the deuteron EDM. During this talk, recent results of the first deuteron EDM measurements are presented.