Search for Lorentz and CPT Violation Effects in Muon Spin Precession

Details Search for Lorentz and CPT Violation Effects in Muon Spin Precession Search for Lorentz and CPT Violation Effects in Muon Spin Precession

2007-09-28

arxiv.org/abs/0709.4670v3

Phys.Rev.Lett.100:091602, 2008

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 3 figures, submitted to Physical Review Letters, Modified to answer the referees suggestions

Scientific paper

10.1103/PhysRevLett.100.091602

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 $\Delta\omega_{a}$ (=$\omega_{a}^{\mu^{+}}-\omega_{a}^{\mu^{-}}$); and a sidereal variation of $\omega_{a}^{\mu^{\pm}}$. No significant effect is found, and the following limits on the standard-model extension parameters are obtained: $b_{Z} =-(1.0 \pm 1.1)\times 10^{-23}$ GeV; $(m_{\mu}d_{Z0}+H_{XY}) = (1.8 \pm 6.0 \times 10^{-23})$ GeV; and the 95% confidence level limits $\check{b}_{\perp}^{\mu^{+}}< 1.4 \times 10^{-24}$ GeV and $\check{b}_{\perp}^{\mu^{-}} < 2.6 \times 10^{-24}$ GeV.

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