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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) - PowerPoint PPT Presentation
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11 June 2003 NuFact'03-WG2 : M. Aoki 1
WG2 Summary-Muon Physics-
Masaharu AokiOsaka University
NuFact'03
11 June 2003 NuFact'03-WG2 : M. Aoki 2
Contents
◆Muon PhysicsGolden Trio (-LFV, g-2 and -EDM)
◆Future muon beams◆R&D for the future muon beams
TargetPion Capture & Decay
◆Summary
11 June 2003 NuFact'03-WG2 : M. Aoki 3
Muon Physics◆ -LFV
Theory (A de Gouvea)-e conversion in nuclei (M.
Koike)MEG (A. Baldini)MECO (P. Yamin) PRISM/PRIME (A. Sato)
◆ g-2 and -EDM Theory (D. Nomura) g-2 BNL-E821
(L. Roberts)-EDM J-PARC LoI
(W. Morse)
◆ Muon Life Time RAL experiment
(D. Tomono)
Lan (G. Onderwater)
◆ Michel Parameters, etc. TWIST (P. Kitching) T-violation (W. Fetscher)
11 June 2003 NuFact'03-WG2 : M. Aoki 4
◆ Neutrino mixing has been established.
◆ Contribution to LFV process
νe = ν1 cosθ +ν 2 sinθν μ = −ν 1 sinθ + ν 2 cosθ
ν Oscillation & Muon LFV
∝ ( mν
/ mW
)4
≈ 10− 26
Muon LFV process isSensitive to New Physics
Beyond the neutrino Mixing.
A. de Gouvea
11 June 2003 NuFact'03-WG2 : M. Aoki 5
◆ SU(5) SUSY-GUT Predictiononly a few orders of magnitude below the current experimental limit.
◆ SO(10) SUSY-GUT Predictionenhanced by (m/m)2(~100) from SU(5) prediction.
SUSY-GUT Prediction
Process CurrentLimit
SUSY-GUTlevel
N → e N 10-13 10-16
→ e 10-11 10-14
→ 10-6 10-9
Courtesy Hisano
11 June 2003 NuFact'03-WG2 : M. Aoki 6
Muon andν Oscillation
11 June 2003 NuFact'03-WG2 : M. Aoki 7
LeptogenesisCPV in CKM is not enough to explain Baryon Asymmetry
→ New sources of CPV beyond the SMν Oscillation + CPV in lepton sector → leptogenesis
Fukugida & Yanagida ‘86
AND if SUSY exists →・ T-violation in muon LFV
・ muon EDM
11 June 2003 NuFact'03-WG2 : M. Aoki 8
-EDM
D. Nomura
11 June 2003 NuFact'03-WG2 : M. Aoki 9
-EDM & g-2
◆LRS + SeeSaw
11 June 2003 NuFact'03-WG2 : M. Aoki 10
Muon g-2
11 June 2003 NuFact'03-WG2 : M. Aoki 11
SUSY with the Muonµeµeµeννe µeµeµeννe
~~
-LFV
-EDM g-2-e conversion
→ e md
ms
mb
⎛
⎝ ⎜ ⎜ ⎜
⎞
⎠ ⎟ ⎟ ⎟
mνe
mνμ
mν τ
⎛
⎝
⎜ ⎜ ⎜
⎞
⎠
⎟ ⎟ ⎟
m˜ d
m s
m˜ b
⎛
⎝
⎜ ⎜ ⎜
⎞
⎠
⎟ ⎟ ⎟
m e e 2 Δm e μ
2 Δm e τ 2
Δm μ e 2 m μ μ
2 Δm˜ μ τ 2
Δm τ e 2 Δm τ μ
2 m˜ τ τ 2
⎛
⎝
⎜ ⎜ ⎜
⎞
⎠
⎟ ⎟ ⎟
quark
lepton (neutrino) slepton
squarknormal particles SUSY particles
ex. K-decays, B-decays
ex. neutrino oscillation ex. charged lepton LFV
CPV
µeµeµeννe
~~
11 June 2003 NuFact'03-WG2 : M. Aoki 12
New Generation of Muon Experiments
◆ Muon LFVBR( e ) < 10-13 (MEG)BR(N e N) < 10-16 (MECO)BR(N e N) < 10-18
(PRISM/PRIME)
◆ -EDM (J-PARC LoI)d< 10-19 e.cm d < 10-24 e.cm
◆ g-2 (J-PARC LoI)0.7 ppm 0.05 ppm
10-1410-1210-1010-810-610-410-2
1940195019601970198019902000Year
KL0→eK+→πeA→eA→eee→e
11 June 2003 NuFact'03-WG2 : M. Aoki 13
MEG and e
1m
e+
Liq. Xe ScintillationDetector
DrifChaber
Liq.XeSciνillaioνDeecor
e+
TiiνCouνer
SoππiνTareThiνSuπercoνduciνCoil
MuoνBea
DrifChaber
Easy signal selection with + at rest
e+ + Ee = E = 52.8 MeV
qe = 180°Detector outline
• Stopped beam of >107 /sec in a 150 m 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 for e+ momentum
• Scintillation counters for e+ timing
Talk by A. Baldini
11 June 2003 NuFact'03-WG2 : M. Aoki 14
MEG and e (cont'd)
◆Sensitivity
◆Schedule
seleì eeeπ ⋅⋅⋅Ω
⋅⋅=
4RT
1SES 410-14
Single Event Sensitivity
eã2
eã2
ãeìacc ÄÄÄÄ tèEERBR ××××∝ 210-14
310-15
BackgroundscorrBR
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
Planning R & D Assembly Data Taking
nownowLoILoI ProposalProposalRevisedRevised
documentdocument
11 June 2003 NuFact'03-WG2 : M. Aoki 15
MECO and N e NStraw
Tracker
Crystal Calorimeter
Muon Stopping Target
Muon Beam Stop
Superconducting Production Solenoid
(5.0 T – 2.5 T)Superconducting
Detector Solenoid (2.0 T – 1.0 T)
Superconducting Transport Solenoid (2.5 T – 2.1 T)
CollimatorsBased on MELC design:
4 x 1013 incident p/sec
1 x 1011 stopping µ/sec
Talk by P. Yamin
11 June 2003 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 Re = 10-16
Contributions to the Signal Rate FactorRunning time (s) 107
Proton flux (Hz) (50% duty factor, 740 kHz micropulse) 4 1013
entering transport solenoid / incident proton 0.0043 stopping probability 0.58 capture probability 0.60Fraction of capture in detection time window 0.49Electron trigger efficiency 0.90Fitting and selection criteria efficiency 0.19
Detected events for Re = 10-16 5.0
11 June 2003 NuFact'03-WG2 : M. Aoki 17
N e NTalk by Masafumi Koike
11 June 2003 NuFact'03-WG2 : M. Aoki 18
PRISM and N e NTalk by A. Sato
11 June 2003 NuFact'03-WG2 : M. Aoki 19
PRIME
11 June 2003 NuFact'03-WG2 : M. Aoki 20
€
ω =−emaB + 1
γ 2 −1− a
⎛ ⎝ ⎜
⎞ ⎠ ⎟β × Ec
+ η2Ec
+ β × B ⎛
⎝ ⎜
⎞
⎠ ⎟
⎧ ⎨ ⎪ ⎩ ⎪
⎫ ⎬ ⎪ ⎭ ⎪
-EDM◆Cancel g-2 by external E
E = aBcb2 E=2 MeV/m 、 B=0.25 T
◆E which causes EDM precessionE=Bcb B=0.25 T → E=72 MeV/m
Talk by W. Morse
11 June 2003 NuFact'03-WG2 : M. Aoki 21
PRISM-II for -EDM◆ High momentum pion capture
0.7 ~ 1.1 GeV/c◆ Backward decay of pion
p = 500 MeV/cMuon yield ~2×1010
Polarization ~0.6◆ Phase rotation
Transverse Acceptance 800 π mm.mradMomentum acceptance ±30% Decay survivability ~56%
◆ NP2 = 109~1010 /sec d = 10-24 ecm
1st Ring ofFFAG-based Neutrino Factory
11 June 2003 NuFact'03-WG2 : M. Aoki 22
Staging Scenario
◆ Pion Capture (MECO)Muon LFV
◆ Neutrino Factory◆ Muon Collider
◆ Muon Factory-II (PRISM-II)Muon EDM
◆High Power Proton DriverMuon g-2
◆ Muon Factory (PRISM)Muon LFV
Muon g-2
Physics outcomesat each stage
11 June 2003 NuFact'03-WG2 : M. Aoki 23
process ChargeIntensity pulse
width(nsec)
pulseinterval(sec)
Eνery(MeV)
Moeνusπread(%) πuriy Beasize Polarizaioν
Ν->eΝ'(πulsed) - 10^21 10-100 1-1000 <20 <10 ν/a
Ν->eΝ'(cleaν) - 10^20 10-100 1-1000 <20 3 10^-15(π) c ν/a
−>e + 10^17 DC <1 1 <10 10^-2(e) c ν/ayesifseeν
() + 10^14 ~100 30-100 4 1-10 deπol
()[πioνbea] + 10^14 ~100 30-100 4 1-10 πbea
ichel + 10^16 <0.5 >0.02 30-40 1-3 100
πolarizaioν + 10^16 <0.5 >0.02 30-40 1-3 ~100
-2 +- 10^15 <50 >1000 3100 10^-2 yes
ed +- 10^16 <50 >1000 <1000 10^-3 yes
ao - 10^16 <100 100-1000 1-4loωer 1-5 10^-2(e) c ν/a
lifescieνce + 10^15 1 100-1000 1-4 1-5 ,c ν/a
CF - 10^19 >100 ν/a
€
0107sec∫
Future Muon Beams
◆Discussion at NuFact'02
K. Yoshimura
11 June 2003 NuFact'03-WG2 : M. Aoki 24
Muon Physics◆ m-LFV
Theory (A de Gouvea) m-e conversion in nuclei (M. K
oike) 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)
Lan (G. Onderwater)
◆ Michel Parameters, etc. TWIST (P. Kitching) T-violation (W. Fetscher)
11 June 2003 NuFact'03-WG2 : M. Aoki 25
11 June 2003 NuFact'03-WG2 : M. Aoki 26
Muon as Tools
◆Unstable Nuclear PhysicsMuonic X-ray (P. Strasser)
◆Material Science/Biology-SR
◆Energy Production-CF
plenary talk by K. Ishida
11 June 2003 NuFact'03-WG2 : M. Aoki 27
Unstable Nuclear Physicswith Muons
◆ Combination of Nuclear Physics and MuonUnique Frontier of Science
11 June 2003 NuFact'03-WG2 : M. Aoki 28
R&DTarget, Pion Capture & Decay
11 June 2003 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
11 June 2003 NuFact'03-WG2 : M. Aoki 30
MECO Target
inlet outlet
beam direction
highest temperature location
Target Center
Target/Water Interface
Water Channel Center
397 K
293 K
Water Inlet
Titanium Tube Inner Surface
Target Core
11 June 2003 NuFact'03-WG2 : M. Aoki 31
PRISM Target
◆ 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?
◆ 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?
11 June 2003 NuFact'03-WG2 : M. Aoki 32
Solenoid Capture & Decay
◆ K. Paul Solenoid OptimizationCapture 20TDecay 5TExit 1.25T
11 June 2003 NuFact'03-WG2 : M. Aoki 33
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
Mockup
240 mm
Thermal balance
Theater
Thermal balance Tbeam
11 June 2003 NuFact'03-WG2 : M. Aoki 34
Low-Energy Muons◆ High-Intensity Low-Energy muons for-SR4 MeV, 100% polarizedDai Omega
(H. Miyatera) 4 x 105 +/s
(2.5 kW)Super Omega (K. Shimomura)
◆ Laser ExcitationSuper Slow Muon Beam
(Y. Matsuda)
11 June 2003 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.
11 June 2003 NuFact'03-WG2 : M. Aoki 36
End of Slide
11 June 2003 NuFact'03-WG2 : M. Aoki 37Bill Marciano at annual BNL/HEP Review, 4/03 from a talk by P. Yamin
Muon Physics isan Essential Component
11 June 2003 NuFact'03-WG2 : M. Aoki 38
PRISM and N e N
◆ Budget approval for PRISM-FFAG ConstructionFFAG ringOne RFKicker
◆ 5 year R&DPhase rotationIonization cooling
11 June 2003 NuFact'03-WG2 : M. Aoki 39
BNL g-2 experiment
•p = 3.1 GeV/c
€
aμ + =11659204(7)(5) ×10−10 (0.7 ppm)
Talk by L. Roberts
11 June 2003 NuFact'03-WG2 : M. Aoki 40
Muon Lifetime Measurement◆ Three fundamental input parameters to SM◆ Da/a ~ 0.045 ppm, DGF/GF ~ 9 ppm, DMZ/MZ ~ 23 ppm
11 June 2003 NuFact'03-WG2 : M. Aoki 41
Recent Experiments◆ RAL measurement
D. Tomono
D <10 ppm (syst.)Physics run end.During Analysis
◆ Lan (PSI)G. OnderwaterD ~ 2 ps (1 ppm)
2004~2005 Physics Run◆ FAST (PSI)
2004 Physics Run
11 June 2003 NuFact'03-WG2 : M. Aoki 42
Michel Parameters◆TWIST Talk by P. Kitching
11 June 2003 NuFact'03-WG2 : M. Aoki 43
T-violation Measurement
Preliminary results consistent with SM within 1.4%
Future Goal
a talk by W. Fetscher
11 June 2003 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 s Vibration Measurement by Laser
11 June 2003 NuFact'03-WG2 : M. Aoki 45
Horn Collection R&D◆B. Autin FUNNELING
4 independent target-horn-cooling + funnelRepetition frequency 50 -> 12.5 HzAverage current in the horn 14.5 -> 3.6 kAPower dissipation 39 -> 9.7 kW
11 June 2003 NuFact'03-WG2 : M. Aoki 46
Tools
◆F. MeotAnalytical Study of the pion decay
Recommended