1 / 35

Unlocking Mysteries: Physics of Electric Dipole Moments in Storage Rings

Dive into the fascinating world of Electric Dipole Moments (EDMs) and their implications in particle physics, including CP-violation, SUSY, and experimental techniques. Explore the potential of EDM searches as probes of physics beyond the Standard Model. Discover the intricate dynamics of EDMs in storage rings and the critical role they play in advancing our understanding of fundamental forces and symmetries.

molly
Download Presentation

Unlocking Mysteries: Physics of Electric Dipole Moments in Storage Rings

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Frascati, 3 October 2005 Physics of Electric Dipole Moments in Storage Rings Yannis K. Semertzidis Brookhaven National Lab • EDMs: What do they probe? • Experimental Technique • Physics of Hadronic EDMs

  2. + - + - For a particle with a spin, only the EDM component along the spin survives. Particles with Spin…

  3. T + - + - P - + A Permanent EDM Violates both T & P Symmetries:

  4. T P A Permanent EDM Violates both T & P Symmetries:

  5. T OK P OK 1st order Stark effect. T, P Violation! 2nd order Stark effect. Allowed! How about Induced EDMs?

  6. T P MDMs are Allowed…

  7. CPT T-Violation CP-Violation Andrei Sakharov 1967: CP-Violation is one of three conditions to enable a universe containing initially equal amounts of matter and antimatter to evolve into a matter-dominated universe, which we see today….

  8. EDM Searches are Excellent Probes of Physics Beyond the SM: SM: One CP-Violating Phase (CKM), Needs loops with all quark families for a non-zero result (High Order Effect). Predicts negligible values. 42 CP-Violating Phases, Needs one loop for a non-zero result (First Order Effect). SUSY:

  9. Electric Dipole Moments in Storage Rings • For P @ 10-28e·cm, D @ 10-29e·cm most models beyond the SM predict values within our sensitivity: • SUSY • Multi-Higgs • Left-Right Symmetric …

  10. + - - + EDM in an Electric Field…

  11. Precession of a Top in a Gravitational Field

  12. E Small Signal + Compare the Zeeman Frequencies When E-field is Flipped: - Usual Experimental Method

  13. Schiff Theorem:A Charged Particle at Equilibrium Feels no Force……An Electron in a Neutral Atom Feels no Force Either: …Otherwise it Would be Accelerated…

  14. Neutron EDM Vs Year “…at 6 x 10-26 e cm, it is analogous to the Earth's surface being smooth and symmetric to less than 1 µm” (John Ellis).

  15. Schiff Theorem:A Charged Particle at Equilibrium Feels no Force……An Electron in a Neutral Atom Feels no Force Either. However: …the net E-field is not zero!

  16. Current Atomic EDM Limits • Paramagnetic Atoms, 205Tl: electron |de| < 1.610-27e·cm (90%CL) PRL 88, 071805 (2002) • Diamagnetic Atoms, 199Hg Nucleus: |d(199Hg)| < 2.110-28e·cm (95%CL) PRL 86, 2505 (2001)

  17. EDM Status

  18. Future Prospects: • Neutron: Ultra-Cold Neutrons & Polarized 3He stored together in a superfluid 4He. Goal 50-1000, S.K. Lamoreaux et al. • Electron: YbF Ultra-cold molecules. Goal ~1000, B.E. Sauer et al. • Electron: PbO*, goal ~1000, D. DeMille et al.

  19. Neutron EDM at LANSCEAiming for a Factor of 50

  20. Electric Dipole Moments in Storage Rings e.g. 1T corresponds to 300 MV/m! Goal:P @ ~10-28e·cm,D @ ~10-29e·cm

  21. Hadronic EDMs i.e. @ 10-29ecm:

  22. A value of QCD =10-13 would create an EDM of

  23. Quark EM and Color EDMs i.e. Deuterons and neutrons are sensitive to different linear combination of quarks and chromo-EDMs. Similarly with the proton.

  24. Deuteron (D) EDM at 310-27ecm D EDM at ~10-29ecm Relative strength of various EDM limits as a function of left handed down squark mass (O. Lebedev, K. Olive, M. Pospelovand A. Ritz, PRD 70, 016003 (2004) hep-ph/0402023)

  25. “… …” Sensitivity to right-handed mass

  26. Sensitivity to right-handed mass

  27. CEDMs for the down quark vs MN3 Deuteron sensitivityat 10-29 ecm

  28. Electric Dipole Moments in Storage Rings • P @ 10-28e·cm, D @ 10-29e·cm would be the best EDM sensitivity over present or planned experiments for QCD, quark, and quark-chromo(T-odd Nuclear Forces)EDMs. • P, D, 3He, etc., i.e. a facility to pin down the CP-violation source.

  29. EDM in Storage Rings • STORI05 Nuclear Physics in Storage Rings workshop, Bonn/Germany, May 2005 • Frascati/Rome, workshop dedicated to EDM in Storage Rings, 1-11 October, 2005 • “Flavour in the Era of the LHC”, EDM presentation, 7-11 November, 2005 • Letter of Intent on the resonance method by the end of 2005.

  30. Extra Slides

  31. S. Lamoreaux at “Lepton Moments” E=5MV/m, T=108s R&D

  32. Cost of the n-EDM Experiment at LANSCE • $10M for the experimental apparatus • $9M for the Beamline • R&D? • Total $19M plus R&D

More Related