Electric Dipole Moment of the Deuteron Experiment:

• EDM Violates T-Symmetry: Connected to CP-Violation and the Matter-Antimatter Asymmetry of the Universe.

• EDMs are Excellent Probes of Physics Beyond the SM.

10/14/2003Y.k. Semertzidis

EDM Collaboration M. Aoki13, M. Auzinsh9, V. Balakin2, A. Bazhan2, G.W. Bennett4, R.M. Carey3,

P. Cushman10, P.T. Debevec7, A. Dudnikov2, F.J.M. Farley15, D.W. Hertzog7, M. Iwasaki14, K. Jungmann5, D. Kawall15, B. Khazin2, I.B. Khriplovich2, B. Kirk4, Y. Kuno13, D.M. Lazarus4, L.B. Leipuner4, V. Logashenko2,3, K.R. Lynch3, W.J. Marciano4, R. McNabb10, W. Meng4, J.P. Miller3,*, W.M. Morse4, C.J.G. Onderwater7, Y.F. Orlov6, C.S. Ozben7, R. Prigl4, S. Redin2, S. Rescia4, B.L. Roberts3, Y.K. Semertzidis4,*, N. Shafer-Ray11, A. Silenko1, E.J. Stephenson8, K. Yoshimura12

1. Belarusian State University, Belarus; 2. BINP, Novosibirsk; 3. Boston University; 4. Brookhaven National Laboratory; 5. Kernfysisch Versneller Instituut, Groningen; 6. Newman Laboratory, Cornell University, Ithaca; 7. University of Illinois, at Urbana-Champaign; 8. Indiana University; 9. University of Latvia; 10. University of Minnesota; 11. University of Oklahoma; 12. KEK, Japan; 13. Osaka University, Japan; 14. RIKEN, Japan; 15. Department of Physics, Yale University, New Haven.

* Spokesperson

Radial E-field to Cancel the g-2 Precession in a Storage Ring:

• Radial E-Field: 2aBcER

The method works well for particles with small anomalous magnetic moment a, like deuterons (a = -0.143), etc.

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Deuteron Statistical Error @ BNL:

TotcRpd fTNAPaE

a2

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15.6

p : 3s. Polarization Lifetime (Coherence Time)A : 0.3. The left/right asymmetry observed by the polarimeterP : 0.55. The beam polarizationNc : 1011d/cycle. The total number of stored particles per cycleTTot: 107s. Total running timef : 0.1. Useful event rate fractionER : 3.5MV/m. Radial electric field

cme103 28 d

Deuteron EDM at 10-27 ecm:

• It Improves the T-odd Nuclear Forces Limits from 199Hg by a Factor of 100.

(Sushkov, Flambaum, Khriplovich Sov. Phys. JETP, 60, p. 873 (1984) and Khriplovich and Korkin, Nucl. Phys. A665, p. 365 (2000)).

• It Improves the Current Proton EDM Limit by a Factor of ~100,000 and that of the Neutron by a Factor of ~100.

What’s Needed:• An Optimized Ring for Measuring the EDM of the

Deuteron: R~30m, B~0.13T, E~3.5MV/m, 82m Long Straight Sections for Polarimeters. Cost:~$20M (Includes G&A plus 25% Contingency)

• 1011 Polarized Deuterons/cycle of 1GeV/c Momentum.

• Deuteron Polarimeters.

Well Matched with BNL Expertise and Capabilities…

Proposal Early Next Year…

Sensitive EDM Experiments will bring the Next Breakthrough in Elementary Particle Physics; BNL Can & Should Play a Prominent Role in this Field.

We are close to finishing working on the systematics, aiming for a

EDM of Hadrons:

• Neutron: n |dn| < 6.010-26e·cm (90%CL) PRL 82, 904 (1999)

• Diamagnetic Atoms, 199Hg: |d(199Hg)| < 2.110-28e·cm (95%CL)

PRL 86, 2505 (2001)

Predictions in Specific Models

The predicted value for the electron is 10 times lessthan the current experimental limit.

50 effect at 10-24 ecm Exp. Sensitivity!

Muon EDM Experiment: (http://www.bnl.gov/edm)

• Need NP2=1016 for 10-24ecm. Muon EDM LOI to J-PARC, <one year of running.

• Systematics much less than 10-24ecm• Beam Power at J-PARC 8 times of AGS

• We have received strong encouragement from the J-PARC Project Manager to Submit a Proposal

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Canceling the g-2 precession…