Aachen 2019 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 15: CP-Verletzung und Mischung
T 15.3: Vortrag
Montag, 25. März 2019, 16:35–16:50, S15
Progress toward the first measurement of the deuteron Electric Dipole Moment at COSY — •Vera Shmakova for the JEDI collaboration — Institut für Kernphysik, Forschungszentrum Jülich, Germany — JINR, Dubna, Russia
One of the major problems of modern particle physics is the inability of
the Standard Model (SM) to explain the matter-antimatter asymmetry of
the Universe. Permanent electric dipole moments (EDMs) of particles
violate both time reversal (T) and parity (P) invariance, and are via
the CPT-theorem also CP-violating. Therefore, measurements of EDMs of
fundamental particles probe new sources of CP-violation, and finding an
EDM would be a strong indication for physics beyond the SM.
Up to now, EDM searches mostly focused on neutral systems (neutrons,
atoms, and molecules). Storage rings, however, offer the possibility to
measure EDMs of charged particles by observing the influence of the EDM
on the spin motion in the ring. Direct searches of proton and deuteron
EDMs using a storage ring thus bear the potential to reach sensitivities
beyond 10−29 e·cm. In this talk I will discuss recent results of a
“percursor” deuteron EDM experiment, presently being carried out at the
Cooler Synchrotron COSY at Forschungszentrum Jülich.