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Mitglied der Helmholtz-Gemeinschaft JEDI JEDI A Search for Charged-particle EDMs with Storage Rings 27.11.2012 | Hans Ströher Seminar Cracow 2012.

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Presentation on theme: "Mitglied der Helmholtz-Gemeinschaft JEDI JEDI A Search for Charged-particle EDMs with Storage Rings 27.11.2012 | Hans Ströher Seminar Cracow 2012."— Presentation transcript:

1 Mitglied der Helmholtz-Gemeinschaft JEDI JEDI A Search for Charged-particle EDMs with Storage Rings | Hans Ströher Seminar Cracow 2012

2 22. Januar 2014 Institut für Kernphysik (IKP) Folie 2 JEDI – The srEDM Search at FZ Jülich Outline of the talk Introduction Precision physics Electric Dipole Moments (EDM) TV, CPV Physics impact Baryogenesis, BAU Charged particle EDMs Storage Rings Steps towards realization Precursor

3 22. Januar 2014 Institut für Kernphysik (IKP) Folie 3 JEDI – The srEDM Search at FZ Jülich Outline of the talk Introduction Precision physics Electric Dipole Moments (EDM) TV, CPV Physics impact Baryogenesis, BAU Charged particle EDMs Storage Rings Steps towards realization Precursor

4 22. Januar 2014 Institut für Kernphysik (IKP) Folie 4 Introduction – Big Challenges Perception of the HEP-community: 3 physics frontiers

5 22. Januar 2014 Institut für Kernphysik (IKP) Folie 5 Introduction – Physics Frontiers Energy frontier (LHC and possible future successors) Search for the origin of mass (Higgs), SUSY Energy

6 22. Januar 2014 Institut für Kernphysik (IKP) Folie 6 Introduction – Physics Frontiers Search for the origin of mass (Higgs), SUSY Quest for Dark Matter and Dark Energy Energy Cosmic Cosmic frontier (AMANDA, Auger, Icecube, …)

7 22. Januar 2014 Institut für Kernphysik (IKP) Folie 7 Introduction – Physics Frontiers Intensity frontier (Super-beams) Search for the origin of mass (Higgs), SUSY Secrets of neutrinos Quest for Dark Matter and Dark Energy Energy Intensity Cosmic

8 22. Januar 2014 Institut für Kernphysik (IKP) Folie 8 Secrets of neutrinos Introduction – Physics Frontiers A most promising additional frontier: precision Search for the origin of mass (Higgs), SUSY Quest for Dark Matter and Dark Energy Energy Intensity Cosmic Precision (In-)stability of the proton

9 22. Januar 2014 Institut für Kernphysik (IKP) Folie 9 Introduction – Physics Frontiers A most promising additional frontier: precision Search for the origin of mass (Higgs), SUSY Secrets of neutrinos Quest for Dark Matter and Dark Energy (In-)stability of the proton Energy Intensity Cosmic Precision Complexity

10 22. Januar 2014 Institut für Kernphysik (IKP) Folie 10 Introduction – Physics Frontiers A most promising additional frontier: precision ESPP, Cracow, September 2012

11 22. Januar 2014 Institut für Kernphysik (IKP) Folie 11 Introduction – Precision Frontier Striving for the ultimate precision/sensitivity: example hydrogen Johann Jakob Balmer (1885) Balmer Series H-atom

12 22. Januar 2014 Institut für Kernphysik (IKP) Folie 12 Introduction – Precision Frontier Striving for the ultimate precision/sensitivity Balmer Series H-atom Lamb-shift QED g/2 = 1 + /2 ~ Johann Jakob Balmer (1885) Willis E. Lamb (1947)

13 22. Januar 2014 Institut für Kernphysik (IKP) Folie 13 Introduction – Precision Frontier V. Weisskopf: To understand hydrogen is to understand all of physics Balmer Series H-atom Electron MDM SM test Gerald Gabrielse (et al.) (2008) Johann Jakob Balmer (1885) (…)

14 22. Januar 2014 Institut für Kernphysik (IKP) Folie 14 Introduction – Precision Frontier Search for Electric Dipole Moments (EDM) of fundamental particles Adapted from: Nature, Vol 482 (2012) Example: Neutron (nEDM)

15 22. Januar 2014 Institut für Kernphysik (IKP) Folie 15 An EDM is VEEEEEE … EEERY small !! Current upper limit separation ~ size of a hair expand Nucleon Earth 1 fm Introduction – Precision Frontier fm

16 22. Januar 2014 Institut für Kernphysik (IKP) Folie 16 JEDI – The srEDM Search at FZ Jülich Outline of the talk Introduction Precision physics Electric Dipole Moments (EDM) TV, CPV Physics impact Baryogenesis, BAU Charged particle EDMs Storage Rings Steps towards realization Precursor

17 22. Januar 2014 Institut für Kernphysik (IKP) Folie 17 Physics – Electric Dipoles Charge separation creates an electric dipole Definition p = q s

18 22. Januar 2014 Institut für Kernphysik (IKP) Folie 18 Physics – Electric Dipoles Charge separation creates an electric dipole Definition Example: H 2 O p = q s Water molecule: permanent electric dipole (has de- generate GS w/ different parity) p ~ 6 x C m ~ 4 x e cm

19 22. Januar 2014 Institut für Kernphysik (IKP) Folie 19 Physics – Fundamental Particles Do particles (e.g., electron, nucleon) have an EDM? Charge symmetric (round) no EDM

20 22. Januar 2014 Institut für Kernphysik (IKP) Folie 20 Physics – Fundamental Particles Charge symmetric (round) Not charge symmetric EDM (aligned w/ spin) T operation creates a different state no EDM d < e cm Do particles (e.g., electron, nucleon) have an EDM?

21 22. Januar 2014 Institut für Kernphysik (IKP) Folie 21 Physics – Discrete Symmetries Violation of discrete symmetries (P and T) Motivation of N.F. Ramsey, E.M. Purcell to search for nEDM; found no PV: d < e cm IF particle has an EDM If CPT holds, EDM violates CP

22 22. Januar 2014 Institut für Kernphysik (IKP) Folie 22 Parity- (P) and Charge-Parity- (CP) violation Physics – Discrete Symmetries C.S. Wu et al. (1957) Nobel Prize 1957 Lee,Yang … also observed in -decay …

23 22. Januar 2014 Institut für Kernphysik (IKP) Folie 23 Parity- (P) and Charge-Parity- (CP) violation Physics – Discrete Symmetries Nobel Prize 1980 Cronin, Fitch J. Cronin, V. Fitch et al. (1964) … also observed in other systems (B, D)

24 22. Januar 2014 Institut für Kernphysik (IKP) Folie 24 No exp´tly known CPV in QCD (no reason for it; strong CP problem) Physics – CPV in Standard Model CP symmetry breaking due to the weak interaction: Cabibbo-Kobayashi-Maskawa (CKM)-matrix connects the quark weak eigenstates and the quark mass eigenstates: CKM matrix is unitary; if V ij are not real, CP will be violated finite area of the unitary-triangle!

25 22. Januar 2014 Institut für Kernphysik (IKP) Folie 25 Physics beyond the Standard Model (BSM) Physics – Why is CPV so interesting? CPV in the SM points to physics we do not understand CPV is highly sensitive to physics beyond the SM (New Physics) CPV is accessible to a wide range of experiments New source of CPV required for baryogenesis

26 22. Januar 2014 Institut für Kernphysik (IKP) Folie 26 JEDI – The srEDM Search at FZ Jülich Outline of the talk Introduction Precision physics Electric Dipole Moments (EDM) TV, CPV Physics impact BAU, baryogenesis Charged particle EDMs Storage Rings Steps towards realization Precursor

27 22. Januar 2014 Institut für Kernphysik (IKP) Folie 27 Physics – Baryogenesis Matter and antimatter in our Universe (…)

28 22. Januar 2014 Institut für Kernphysik (IKP) Folie 28 Assertion: Universe started with equal amounts of matter and antimatter ! Early Universe Big Bang Physics – Baryogenesis Matter Anti-matter

29 22. Januar 2014 Institut für Kernphysik (IKP) Folie 29 Very soon, a slight asymmetry developed (CP- / T-violation) Early Universe Matter Anti-matter Big Bang Physics – Baryogenesis

30 22. Januar 2014 Institut für Kernphysik (IKP) Folie 30 All the anti-matter annihilated with matter Early Universe Matter Anti-matter Big Bang Physics – Baryogenesis Matter anti-matter annihilation photons

31 22. Januar 2014 Institut für Kernphysik (IKP) Folie 31 Now, only matter is left over ! Early Universe Today Matter Anti-matter Matter anti-matter annihilation photons Big Bang Physics – Baryogenesis

32 22. Januar 2014 Institut für Kernphysik (IKP) Folie 32 The mystery of the missing antimatter (the puzzle of our existence) Physics – Baryogenesis

33 22. Januar 2014 Institut für Kernphysik (IKP) Folie 33 Physics – Baryogenesis Ingredients for baryogenesis: 3 Sakharov conditions

34 22. Januar 2014 Institut für Kernphysik (IKP) Folie 34 Physics – Potential of EDMs N. Arkani-Hamed (IAS, Princeton) at Intensity Frontier WS, USA (2011)

35 22. Januar 2014 Institut für Kernphysik (IKP) Folie 35 G. Isidori at ESPP Open Symposium, Cracow (Sept. 2012) Physics – Potential of EDMs

36 22. Januar 2014 Institut für Kernphysik (IKP) Folie 36 J.M. Pendlebury: nEDM has killed more theories than any other single expt. Physics – Potential of EDMs

37 22. Januar 2014 Institut für Kernphysik (IKP) Folie 37 P. Harris, K. Kirch … A huge worldwide effort EDMs – Ongoing/planned Searches new

38 22. Januar 2014 Institut für Kernphysik (IKP) Folie 38 EDMs – Why another Experiment ? J. De Vries … What we may learn from EDMs Strong CP problem

39 22. Januar 2014 Institut für Kernphysik (IKP) Folie 39 EDMs – Why another Experiment ? Need for different EDMs to pin down the source(s) Strong CP problem Hadron EDMs are complex, richer

40 22. Januar 2014 Institut für Kernphysik (IKP) Folie 40 JEDI – The srEDM Search at FZ Jülich Outline of the talk Introduction Precision physics Electric Dipole Moments (EDM) TV, CPV Physics impact Baryogenesis, BAU Charged particle EDMs Storage Rings Steps towards realization Precursor

41 22. Januar 2014 Institut für Kernphysik (IKP) Folie 41 EDMs – Executive Summary A spectacular opportunity that should not be missed ! Electric Dipole Moments (EDMs) of charged particles (p,d, …): Why ?Physics case: a fundamental question Cosmic Baryon Asymmetry Physics beyond the Standard Model Highest sensitivity, discovery potential How ?New technique: spin tracking in E-, B-fields Polarized particles Precision storage ring Where ?Jülich (best place on earth) When ?Phases: Ongoing: Tests at COSY Step 1: Precursor at COSY + Step 2: Dedicated EDM ring Spin-off ?Accelerators, instrumentation, metrology, …

42 22. Januar 2014 Institut für Kernphysik (IKP) Folie 42 Frequency/energy difference due to EDM ( d ) EDMs – Measurement Technique (I) Particle in parallel/anti-parallel B- and E-field:

43 22. Januar 2014 Institut für Kernphysik (IKP) Folie 43 EDM ( d ) in E-field produces a minuscule torque ( spin rotation) Polarized charged particles in a storage ring: EDM MDM Adapted from: Nature, Vol 482 (2012) EDMs – Measurement Technique (II)

44 22. Januar 2014 Institut für Kernphysik (IKP) Folie 44 EDM ( d ) in E-field produces a minuscule torque ( spin rotation) EDMs – Storage Ring Technique Polarized charged particles in a storage ring: development of a transverse polarization component

45 22. Januar 2014 Institut für Kernphysik (IKP) Folie 45 EDM ( d ) in E-field produces a minuscule torque ( spin rotation) EDMs – Storage Ring Technique Spin Precession (relative to momentum): Thomas – BMT Equation: Pure electric ring: B = 0, magic momentum, only if G > 0 (p) Combined E- and B- ring all-in-one (p, d, 3 He) Pure magnetic ring (COSY) tests frozen spin

46 22. Januar 2014 Institut für Kernphysik (IKP) Folie 46 pEDM all-electric ring BNL (via DOE-NP) EDMs – Storage Ring Projects Two projects: US (BNL, FNAL) and Europe (FZJ)

47 22. Januar 2014 Institut für Kernphysik (IKP) Folie 47 pEDM all-electric ring FNAL (via DOE-HEP) EDMs – Storage Ring Projects Two projects: US (BNL, FNAL) and Europe (FZJ) Accumulator

48 22. Januar 2014 Institut für Kernphysik (IKP) Folie 48 pEDM all-electric ring BNL, FNAL (p,d, …)EDM all-in-one ring (E,B) FZJ (COSY): JEDI EDMs – Storage Ring Projects Two projects: US (BNL, FNAL) and Europe (FZJ)

49 22. Januar 2014 Institut für Kernphysik (IKP) Folie 49 pEDM all-electric ring BNL, FNAL (p,d, …)EDM all-in-one ring (E,B) FZJ (COSY): JEDI EDMs – Storage Ring Projects Two projects: US (BNL, FNAL) and Europe (FZJ) Critical (common) R&D projects Spin Coherence Time ( COSY) Polarimetry (data base) ( COSY) Beam Position Monitoring ( RHIC) Deflectors ( COSY) Spin Tracking (Simulations) …

50 22. Januar 2014 Institut für Kernphysik (IKP) Folie 50 NO direct measurement for proton- and deuteron-EDM yet ! EDMs – Sensitivity Reach Adapted from: Nature, Vol 482 (2012) pEDM dEDM EDM search in charged baryon (systems)

51 22. Januar 2014 Institut für Kernphysik (IKP) Folie 51 JEDI – The srEDM Search at FZ Jülich Outline of the talk Introduction Precision physics Electric Dipole Moments (EDM) TV, CPV Physics impact Baryogenesis, BAU Charged particle EDMs Storage Rings Steps towards realization Precursor

52 22. Januar 2014 Institut für Kernphysik (IKP) Folie 52 EDMs – Stepwise Approach Stored circulating beam RF EB-Field Vertically polarized beam Polarimeter Establish srEDM, first direct measurement ; sensitivity ~ e cm First step: Precursor Experiment (using COSY + ) Comparison of B* = 0 (EDM effect) and E* = 0 (no EDM effect)

53 22. Januar 2014 Institut für Kernphysik (IKP) Folie 53 EDMs – Stepwise Approach Sensitivity e cm discovery potential Polarized counter- rotating beams Iron-free Copper- wound magnets Adapted from: Richard Talman Cornell, Febr Second step: A dedicated EDM Storage Ring (with COSY as injector)

54 22. Januar 2014 Institut für Kernphysik (IKP) Folie 54 EDMs – Summary, Conclusion A spectacular opportunity that should not be missed ! EDMs of charged particles in a Storage Ring: Physics case: must-do (complementary to LHC) IKP is one of the (very few) places worldwide where this can be pursued: COSY:testbed facility first direct measurement (precursor) Experience with polarized beams Forschungszentrum Jülich (HGF): Scientific and technological environment Continuity and persistence (> 10yr project) Cooperations: RWTH: Physics, Engineers (JARA-Fame) BNL (US) (pEDM, use of COSY) PNPI (Russia), KVI (NL), Ferrara (I), Cracow (PL)

55 22. Januar 2014 Institut für Kernphysik (IKP) Folie 55


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