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WG2 Summary -Muon Physics-

WG2 Summary -Muon Physics-. Masaharu Aoki Osaka University NuFact'03. Contents. Muon Physics Golden Trio ( m -LFV, g-2 and m -EDM) Future muon beams R&D for the future muon beams Target Pion Capture & Decay Summary. m -LFV Theory (A de Gouvea) m -e conversion in nuclei (M. Koike)

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WG2 Summary -Muon Physics-

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  1. WG2 Summary-Muon Physics- Masaharu Aoki Osaka University NuFact'03 NuFact'03-WG2 : M. Aoki

  2. Contents • Muon Physics • Golden Trio (m-LFV, g-2 and m-EDM) • Future muon beams • R&D for the future muon beams • Target • Pion Capture & Decay • Summary NuFact'03-WG2 : M. Aoki

  3. m-LFV Theory (A de Gouvea) m-e conversion in nuclei (M. Koike) MEG (A. Baldini) MECO (P. Yamin) PRISM/PRIME (A. Sato) g-2 and m-EDM Theory (D. Nomura) g-2 BNL-E821 (L. Roberts) m-EDM J-PARC LoI (W. Morse) Muon Life Time RAL experiment (D. Tomono) mLan (G. Onderwater) Michel Parameters, etc. TWIST (P. Kitching) T-violation (W. Fetscher) Muon Physics NuFact'03-WG2 : M. Aoki

  4. Neutrino mixing has been established. Contribution to LFV process n Oscillation & Muon LFV Muon LFV process is Sensitive to New Physics Beyond the neutrino Mixing. Very small A. de Gouvea NuFact'03-WG2 : M. Aoki

  5. SUSY-GUT Prediction • SU(5) SUSY-GUT Predictiononly a few orders of magnitude below the current experimental limit. • SO(10) SUSY-GUT Predictionenhanced by (mt/mm)2(~100) from SU(5) prediction. Courtesy Hisano NuFact'03-WG2 : M. Aoki

  6. Muon and n Oscillation NuFact'03-WG2 : M. Aoki

  7. Leptogenesis CPV in CKM is not enough to explain Baryon Asymmetry → New sources of CPV beyond the SM • Oscillation + CPV in lepton sector → leptogenesis Fukugida & Yanagida ‘86 AND if SUSY exists → ・T-violation in muon LFV ・muon EDM NuFact'03-WG2 : M. Aoki

  8. m-EDM D. Nomura NuFact'03-WG2 : M. Aoki

  9. m-EDM & g-2 • LRS + SeeSaw NuFact'03-WG2 : M. Aoki

  10. Muon g-2 NuFact'03-WG2 : M. Aoki

  11. ~ ~ ~ ~ m m m m SUSY with the Muon CPV m-LFV m m g-2 m-EDM • m-e conversion • m → e g SUSY particles normal particles squark quark ex. K-decays, B-decays slepton lepton (neutrino) NuFact'03-WG2 : M. Aoki ex. neutrino oscillation ex. charged lepton LFV

  12. New Generation of Muon Experiments • Muon LFV • BR(m  e ) < 10-13 (MEG) • BR(m N  e N) < 10-16 (MECO) • BR(m N  e N) < 10-18 (PRISM/PRIME) • m-EDM (J-PARC LoI) • dm < 10-19 e.cm  dm < 10-24 e.cm • g-2 (J-PARC LoI) • 0.7 ppm  0.05 ppm NuFact'03-WG2 : M. Aoki

  13. Easy signal selection with +at rest • Detector outline • Stopped beam of >107 /sec in a 150 mm target • Liquid Xenon calorimeter for  detection (scintillation) • fast:4 / 22 / 45 ns • high LY: ~ 0.8 * NaI • short X0:2.77 cm • Solenoid spectrometer & drift chambers fore+ momentum • Scintillation counters for e+ timing qeg = 180° e+ +g Ee= Eg=52.8MeV MEG and  e  Talk by A. Baldini NuFact'03-WG2 : M. Aoki

  14. Single Event Sensitivity  410-14  210-14 Revised document Backgrounds now LoI Proposal  310-15 Planning R & D Assembly Data Taking 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 MEG and  e  (cont'd) • Sensitivity • Schedule NuFact'03-WG2 : M. Aoki

  15. MECO and  N e N Talk by P. Yamin Straw Tracker Muon Stopping Target Muon Beam Stop Superconducting Transport Solenoid (2.5 T – 2.1 T) Crystal Calorimeter Superconducting Production Solenoid (5.0 T – 2.5 T) Superconducting Detector Solenoid (2.0 T – 1.0 T) Based on MELC design: 4 x 1013 incident p/sec 1 x 1011 stopping µ/sec Collimators NuFact'03-WG2 : M. Aoki

  16. MECO and  N e N (cont'd) We expect ~ 5 signal events for 107 s (2800 hours) running if Rme = 10-16 NuFact'03-WG2 : M. Aoki

  17.  N e N Talk by Masafumi Koike NuFact'03-WG2 : M. Aoki

  18. PRISM and  N e N Talk by A. Sato NuFact'03-WG2 : M. Aoki

  19. PRIME NuFact'03-WG2 : M. Aoki

  20. m-EDM Talk by W. Morse • Cancel g-2 by external E • E = aBc2 E=2 MeV/m、B=0.25 T • E which causes EDM precession • E=Bc B=0.25 T → E=72 MeV/m NuFact'03-WG2 : M. Aoki

  21. PRISM-II for m-EDM 1st Ring of FFAG-based Neutrino Factory • High momentum pion capture • 0.7 ~ 1.1 GeV/c • Backward decay of pion • pm = 500 MeV/c • Muon yield ~2×1010 • Polarization ~0.6 • Phase rotation • Transverse Acceptance 800 p mm.mrad • Momentum acceptance ±30% • Decay survivability ~56% • NP2 = 109~1010 /sec  dm = 10-24 ecm NuFact'03-WG2 : M. Aoki

  22. High Power Proton Driver • Muon g-2 • Pion Capture (MECO) • Muon LFV Physics outcomes at each stage • Muon Factory (PRISM) • Muon LFV • Muon Factory-II (PRISM-II) • Muon EDM • Muon g-2 • Neutrino Factory • Muon Collider Staging Scenario NuFact'03-WG2 : M. Aoki

  23. Future Muon Beams • Discussion at NuFact'02 K. Yoshimura NuFact'03-WG2 : M. Aoki

  24. m-LFV Theory (A de Gouvea) m-e conversion in nuclei (M. Koike) MEG (A. Baldini) MECO (P. Yamin) PRISM/PRIME (A. Sato) g-2 and m-EDM Theory (D. Nomura) g-2 BNL-E821 (L. Roberts) m-EDM J-PARC loI (W. Morse) Muon Life Time RAL experiment (D. Tomono) mLan (G. Onderwater) Michel Parameters, etc. TWIST (P. Kitching) T-violation (W. Fetscher) Muon Physics NuFact'03-WG2 : M. Aoki

  25. NuFact'03-WG2 : M. Aoki

  26. Muon as Tools • Unstable Nuclear Physics • Muonic X-ray (P. Strasser) • Material Science/Biology • m-SR • Energy Production • m-CF plenary talk by K. Ishida NuFact'03-WG2 : M. Aoki

  27. Unstable Nuclear Physicswith Muons • Combination of Nuclear Physics and Muon Unique Frontier of Science NuFact'03-WG2 : M. Aoki

  28. R&DTarget, Pion Capture & Decay NuFact'03-WG2 : M. Aoki

  29. Talks • Target • R. Bennett Europe Plan • H. Kirk US Plan • J. Popp MECO target • K. Yoshimura PRISM target • Solenoid Capture & Decay Channel • K. Paul Optimization • H. Ohnishi Heat Load Test • Horn Collection • S. Gilardoni P.S. test & vibration measurement • B. Autin Funneling • Tools • F. Meot Analytical study of decay channel • Low Energy Muon Applications • H. Miyatera Dai Omega • K. Shimomura Super Omega NuFact'03-WG2 : M. Aoki

  30. Target Center inlet outlet Target/Water Interface highest temperature location 397 K Water Channel Center Titanium Tube Inner Surface Water Inlet beamdirection Target Core 293 K MECO Target NuFact'03-WG2 : M. Aoki

  31. PRISM Target • 1st phase • 1000 A DC • 100 J • 2nd phase • 250 KA 2.5ms Pulse (K2K horn PS) • 15 KW • 3rd phase • 1 MW? • Beam test? • Confine pions inside the target with troidal field • B. Autin, @Nufact01 • Advantage over Solenoid • Low emittance beam • Linear transport element • No SC solenoid channel • Cheaper! • Cooling condition better? NuFact'03-WG2 : M. Aoki

  32. Solenoid Capture & Decay • K. Paul Solenoid Optimization • Capture 20T • Decay 5T • Exit 1.25T NuFact'03-WG2 : M. Aoki

  33. Thermal balance Theater Thermal balance Tbeam Mockup 240 mm Solenoid Capture & Decay • H. Ohnishi Heat Load Test • Measurement/MARS = 1.2~1.3 • Prototype Solenoid R&D Plan • 1/2.5 scale model Stored Energy = 1MJ NuFact'03-WG2 : M. Aoki

  34. Low-Energy Muons • High-Intensity Low-Energy muons form-SR • 4 MeV, 100% polarized • Dai Omega (H. Miyatera) • 4 x 105m+/s(2.5 kW) • Super Omega (K. Shimomura) • Laser ExcitationSuper Slow Muon Beam (Y. Matsuda) NuFact'03-WG2 : M. Aoki

  35. Summary • The muon holds great potential for discovery of the physics beyond the Standard Model. • Technologies developed for the world's Neutrino Factories are also very important for the future of muon physics or vise versa. • Staging is a key toward the realization of the neutrino factory and muon collider. NuFact'03-WG2 : M. Aoki

  36. End of Slide NuFact'03-WG2 : M. Aoki

  37. Bill Marciano at annual BNL/HEP Review, 4/03 Muon Physics is an Essential Component from a talk by P. Yamin NuFact'03-WG2 : M. Aoki

  38. PRISM and  N e N • Budget approval for PRISM-FFAG Construction • FFAG ring • One RF • Kicker • 5 year R&D • Phase rotation • Ionization cooling NuFact'03-WG2 : M. Aoki

  39. BNL g-2 experiment Talk by L. Roberts • pm = 3.1 GeV/c NuFact'03-WG2 : M. Aoki

  40. Muon Lifetime Measurement • Three fundamental input parameters to SM • / ~ 0.045 ppm, GF/GF ~ 9 ppm, MZ/MZ ~ 23 ppm NuFact'03-WG2 : M. Aoki

  41. Recent Experiments • RAL measurementD. Tomono  <10 ppm (syst.) • Physics run end. • During Analysis • mLan (PSI)G. Onderwater ~ 2 ps (1 ppm) • 2004~2005 Physics Run • FAST (PSI) • 2004 Physics Run NuFact'03-WG2 : M. Aoki

  42. Michel Parameters Talk by P. Kitching • TWIST NuFact'03-WG2 : M. Aoki

  43. T-violation Measurement Preliminary results consistent with SM within 1.4% Future Goal a talk by W. Fetscher NuFact'03-WG2 : M. Aoki

  44. Horn Collection R&D • S. Gilardoni • 300 kA, 50 Hz,200 M pulses -> 6 weeks • First inner horn 1:1 prototype • P.S. Test 30 kA, 1 Hz, 100 ms • Vibration Measurement by Laser NuFact'03-WG2 : M. Aoki

  45. Horn Collection R&D • B. Autin FUNNELING • 4 independent target-horn-cooling + funnel • Repetition frequency 50 -> 12.5 Hz • Average current in the horn 14.5 -> 3.6 kA • Power dissipation 39 -> 9.7 kW NuFact'03-WG2 : M. Aoki

  46. Tools • F. Meot • Analytical Study of the pion decay NuFact'03-WG2 : M. Aoki

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