Journal Article

FZJ-2026-02765

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png First experimental limit on the permanent electric dipole moment of the deuteron

Andres, A. ; Hejny, V. (Corresponding author)FZJ* ; Nass, A.FZJ* ; Nikolaev, N. N. ; Pretz, J.FZJ* ; Rathmann, F.FZJ* ; Shmakova, V. ; Slim, J. ; Abusaif, F. ; Aggarwal, A.FZJ* ; Aksentev, A. ; Alberdi, B. ; Barion, L. ; Bekman, I.FZJ* ; Beyß, M. ; Böhme, C.FZJ* ; Breitkreutz, B. ; Canale, N. ; Ciullo, G. ; Dymov, S. ; Fröhlich, N.-O. ; Gebel, R.FZJ* ; Gaisser, M. ; Grigoryev, K. ; Grzonka, D.FZJ* ; Gu, D. ; Heberling, D. ; Hetzel, J. ; Hölscher, D. ; Javakhishvili, O. ; Kacharava, A.FZJ* ; Kamerdzhiev, V. ; Karanth, S. ; Keshelashvili, I.FZJ* ; Kononov, A. ; Laihem, K. ; Lehrach, A.FZJ* ; Lenisa, P. ; Lomidze, N. ; Lorentz, B. ; Macharashvili, G. ; Magiera, A. ; Margos, M. ; Mchedlishvili, D. ; Melnikov, A. ; Müller, F. ; Okropiridze, D.FZJ* ; Pesce, A. ; Piccoli, A. ; Poncza, V. ; Prasuhn, D. ; Saleev, A. ; Shergelashvili, D. ; Shankar, R. ; Shurkhno, N. ; Siddique, S. ; Silenko, A. ; Soltner, H.FZJ* ; Stassen, R.FZJ* ; Stephenson, E. J. ; Stroeher, H.FZJ* ; Tabidze, M. ; Tagliente, G. ; Tempel, V. ; Valdau, Y. ; Vitz, M. ; Wagner, T. ; Wirzba, A.FZJ* ; Wrońska, A. ; Wüstner, P.FZJ* ; Żurek, M.

2026
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/ns3s-ld4k  doi:10.34734/FZJ-2026-02765

Abstract: Permanent electric dipole moments (EDMs) provide a sensitive probe of physics beyond the standard model and are directly linked to additional sources of 𝐶⁢𝑃 violation that could explain the matter-antimatter asymmetry of the Universe. EDM measurements of charged particles in storage rings rely on detecting a small tilt of the invariant spin axis with respect to the ring plane. In this Letter, we present the experimental determination of the invariant spin axis of an ensemble of deuterons in the Cooler Synchrotron (COSY), a conventional magnetic storage ring, using a combination of a radio-frequency Wien filter, a superconducting Siberian snake, and an electron-cooler solenoid. The measurements reveal tilts of a few milliradians, which are dominated by systematic effects. From the observed tilts, we derive the first experimental limit on the deuteron EDM, |𝑑|<2.5e−17  ⁢𝑒 cm⁡(95% C.L.). This result demonstrates the feasibility of using storage rings to search for EDMs of charged stable hadrons and provides a foundation for future dedicated facilities.

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Contributing Institute(s):

1. Experimentelle Hadronstruktur (IKP-1)
2. Experimentelle Hadrondynamik (IKP-2)
3. Kernphysikalische Großgeräte (IKP-4)
4. IKP- Technische und Administrative Infrastruktur (IKP-TA)
5. Zentralinstitut für Technologie (ZEA-1)
6. Zentralinstitut für Elektronik (ZEA-2)
7. Quantum Control (PGI-8)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)
2. 621 - Accelerator Research and Development (POF4-621) (POF4-621)
3. srEDM - Search for electric dipole moments using storage rings (694340) (694340)
4. STRONG-2020 - The strong interaction at the frontier of knowledge: fundamental research and applications (824093) (824093)

Experiment(s):

1. Jülich Electric Dipole moment Investigations

Appears in the scientific report 2026

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Database coverage:
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