Search for Lorentz and CPT Violation Effects in Muon Spin Precession

Journal Article · Fri Mar 07 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.091602· OSTI ID:21123634

Bennett, G W; Brown, H N; Bunce, G; Danby, G T; Larsen, R; Lee, Y Y; Meng, W; Mi, J; Morse, W M; Nikas, D; Prigl, R; Semertzidis, Y K; Warburton, D ^[1]; Bousquet, B; Cushman, P; Duong, L; Giron, S; Kindem, J; Kronkvist, I; Qian, T ^[2]

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1. Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Department of Physics, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

The spin precession frequency of muons stored in the (g-2) storage ring has been analyzed for evidence of Lorentz and CPT violation. Two Lorentz and CPT violation signatures were searched for a nonzero {delta}{omega}{sub a}(={omega}{sub a}{sup {mu}{sup {+-}}{omega}{sub a}{sup {mu}{sup -}}) and a sidereal variation of {omega}{sub a}{sup {mu}{sup {+-}}}. No significant effect is found, and the following limits on the standard-model extension parameters are obtained: b{sub Z}=-(1.0{+-}1.1)x 10{sup -23} GeV; (m{sub {mu}}d{sub Z0}+H{sub XY})=(1.8{+-}6.0)x10{sup -23} GeV; and the 95% confidence level limits b{sub perpendicular}{sup {mu}{sup +}}< 1.4x10{sup -24} GeV and b{sub perpendicular}{sup {mu}{sup -}}<2.6x10{sup -24} GeV.

• OSTI ID: 21123634
• Journal Information: Physical Review Letters, Vol. 100, Issue 9; Other Information: DOI: 10.1103/PhysRevLett.100.091602; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CPT THEOREM
LORENTZ INVARIANCE
MUONS
SPIN
STANDARD MODEL
STORAGE RINGS