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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2008, vol. 100, p. -

Search for lorentz and CPT violation effects in muon spin precession

Bennett G. W., Bousquet B., Brown H. N., Bunce G., Carey R. M., Cushman P., Danby G. T., Debevec P. T., Deile M., Deng H., Deninger W., Dhawan S. K., Druzhinin V. P., Duong L., Efstathiadis E., Farley F. J M, Fedotovich G. V., Giron S., Gray F. E., Grigoriev D., Grosse-Perdekamp M., Grossmann A., Hare M. F., Hertzog D. W., Huang X., Hughes V. W., Iwasaki M., Jungmann K., Kawall D., Kawamura M., Khazin B. I., Kindem J., Krienen F., Kronkvist I., Lam A., Larsen R., Lee Y. Y., Logashenko I., McNabb R., Meng W., Mi J., Miller J. P., Mizumachi Y., Morse W. M., Nikas D., Onderwater C. J G, Orlov Y., Özben C. S., Paley J. M., Peng Q., Polly C. C., Pretz J., Prigl R., Zu Putlitz G., Qian T., Redin S. I., Rind O., Roberts B. L., Ryskulov N., Sedykh S., Semertzidis Y. K., Shagin P., Shatunov Yu M., Sichtermann E. P., Solodov E., Sossong M., Steinmetz A., Sulak L. R., Timmermans C., Trofimov A., Urner D., Von Walter P., Warburton D., Winn D., Yamamoto A., Zimmerman D.

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 Δωa(=ωaμ+- ωaμ-) and a sidereal variation of ωaμ±. No significant effect is found, and the following limits on the standard-model extension parameters are obtained: bZ=-(1.0±1.1)×10-23GeV; (mμdZ0+HXY)=(1.8±6.0)×10-23GeV; and the 95% confidence level limits bμ+<1.4×10-24GeV and bμ-<2.6×10-24GeV. © 2008 The American Physical Society.