Tabletop probes for TeV physics: the search for electric dipole moments EDMs and new physics how to detect an EDM electron EDM in atoms & molecules the state of the art electron EDM search the next generation our approach: PbO* D. DeMille Yale University Physics Department Funding: NSF, Packard, CRDF, NIST, Sloan, Research Corp. Review: Fortson, Sandars, & Barr Physics Today June 2003
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Tabletop probes for TeV physics: the search for electric dipole moments EDMs and new physics how to detect an EDM electron EDM in atoms & molecules.
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Tabletop probes for TeV physics:the search for electric dipole moments
EDMs and new physics
how to detect an EDM
electron EDM in atoms & molecules
the state of the art electron EDM search
the next generation
our approach: PbO*
D. DeMilleYale University
Physics Department
Funding: NSF, Packard, CRDF, NIST, Sloan, Research Corp.
Review:
Fortson, Sandars, & Barr
Physics Today June 2003
An EDM Violates P and T
CPT theorem T-violation = CP-violation
B-B dipoleMagneticH E- E-
ddH dipoleElectric
T
Sd
P
PurcellRamseyLandau
T-violation: a window to new physics
• CP-violation observed in K- and B-mesons T is NOT conserved in nature
• K-, B-meson observations consistent with SM/CKM description including O(1) phase
but also consistent w/models containing new sources of T-violation
• CP-violation in SM is minimal: SM extensions typically include NEW sources of T-
violation
• Observed baryon asymmetry in universe REQUIRES new sources of T-violation
Virtual exotic particles can generate EDMs
e
= E-field
X(new heavy particle)
f’eif
Dimensionless coupling constant
T-violating phase
“natural” assumptions
ff’/ħc sin() ~ 1
mX ~ 100 GeV
typical e-EDM~
de~B
(/)N (me/mX)2 sin()
de 100-1× current limit!(1 vs. 2 loops)
Electron EDM in various SM extensions
not renormalizable loop diagrams
2
5 Fde
d L
ee
Experimental limit:|de| < 1.610-27 ecm
Physics model |de|
Standard Model ~10-41 e·cm
Left-right symmetric
10-26-10-28 e·cm
Lepton flavor-changing
10-26-10-29 e·cm
Multi-Higgs 10-27-10-28 e·cm
Technicolor 10-27-10-29 e·cm
Supersymmetry < 10-25 e·cm
B. Regan, E. Commins, C. Schmidt,
D. DeMille, PRL 88, 071805 (2002)
Models assumenew physics at ~100 GeV& CP-violating phases ~1
Searching for SUSY w/ the electron EDM Implications of current and ongoing electron