Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2001-06-29
Phys.Rev.Lett.87:111804,2001
Physics
High Energy Physics
High Energy Physics - Experiment
4 pages, 4 figures, uses REVTeX and epsf, submitted to Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.87.111804
Following a suggestion of Kostelecky et al. we have evaluated a test of CPT and Lorentz invariance from the microwave spectroscopy of muonium. Hamiltonian terms beyond the standard model violating CPT and Lorentz invariance would contribute frequency shifts $\delta\nu_{12}$ and $\delta\nu_{34}$ to $\nu_{12}$ and $\nu_{34}$, the two transitions involving muon spin flip, which were precisely measured in ground state muonium in a strong magnetic field of 1.7 T. The shifts would be indicated by anti-correlated oscillations in $\nu_{12}$ and $\nu_{34}$ at the earth's sidereal frequency. No time dependence was found in $\nu_{12}$ or $\nu_{34}$ at the level of 20 Hz, limiting the size of some CPT and Lorentz violating parameters at the level of $2\times10^{-23}$ GeV, representing Planck scale sensitivity and an order of magnitude improvement in sensitivity over previous limits for the muon.
Hughes Vernon W.
Jungmann Klaus
Kawall D.
Liu Wende
Perdekamp Matthias Grosse
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