WG4: Muon PhysicsWG4: Muon PhysicsNufact 11, Nufact 11,

August 1-6, 2011, CERN and UniGEAugust 1-6, 2011, CERN and UniGE

Naohito SAITO, Donato NICOLO, and Robert BERNSTEIN

Muon PhysicsMuon Physics

2

MEG@PSIMEG@PSI

CLFV + e+ - (Z,A) e- (Z,A) + e+e+e-

Dipole Momentsg-2EDM

Precision MeasurementsMu HFSMichel Parameters

Mu2e@Fermilab

COMET@J-PARCCOMET@J-PARC

New g-2@Fermilab

g-2/EDM@J-PARC

From Summary at Nufact10 From Summary at Nufact10

cLFV as of Nufact 10 cLFV as of Nufact 10

4

MEGBr< 1.5x10-11

90% C.L.Best Fit : 3x10-

12

DeeMe goal10-14 level

Mu2e and COMET goal10-16 and

beyond

COMET and Mu2e Goal

DeeMe Goal

MEG Limit @ 90% CL

Update: Plenary talk by Satoshi MIHARA, Friday Morning

Bird’s eye photo in Feb. 2008

Large Acceptance Beamline

Mu HFSPrecision measurement of Hyper-Fine Structure of Muonium - Synergy with g-2/EDM (magnet, detector) - Provide lambda for g-2

DeMeeExperiment to search for mu-e conversion in the primary target

g-2/EDMMeasure spin precession precisely　　 Parallel to Magnetic Field g-2　　 Orthogonal to Mag. Field EDM

3 GeV proton beam at 25 Hz

WG4 Agenda (WG4 Agenda (Rm G. Charpak 60-6F-15@CERNRm G. Charpak 60-6F-15@CERN))

Mon: cLFV-I (Mu2e and COMET)Tue: cLFV-II (tau, DeeMe, 3e)Wed-am: TWIST(final!) and g-2/EDMWed-pm: MuHFS and J-PARC MUSEThu-am: Joint WG3&WG4 (PRISM,

MuSIC, COMET)Fri-pm : cLFV-III (MEG)

7Visit Muon Physics WG, if you get bored with NPVisit Muon Physics WG, if you get bored with NP