Berlin 2005 – scientific programme
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T: Teilchenphysik
T 304: Seltene Zerf
älle
T 304.8: Talk
Friday, March 4, 2005, 18:15–18:30, TU H1029
The Deuteron EDM — •C.J.G. Onderwater1 and for the edm-collaboration1,2 — 1Kernfysisch Versneller Instituut, Groningen, The Netherlands — 2Brookhaven National Laboratory, Upton, USA
The existence or absence of large permanent electric dipole moments (EDMs) of subatomic particles, which could help explain the matter antimatter asymmetry in the universe, is one of the most pressing questions in physics today. Within the current standard model, EDMs are unmeasurably small because they violate time reversal symmetry, which is strongly suppressed. However, many standard model extensions predict EDMs that may be in reach of experiment. Therefore, many efforts are underway world wide to design new experiments to reveal these possibly large EDMs. Until recently, it was believed that only neutral systems could be investigated with great accuracy, severely limiting the EDM search. A novel approach exploiting the strong motional electric fields experienced in a magnetic storage ring overcomes this limitation. One of the experimentally and theoretically simplest particles this new method could be used with is the deuteron. The constituents themselves and the forces between them may all contain time reversal violating moments, making this test particularly suitable. The principle of the experimental technique and a summary of the theory will be presented.