${{\boldsymbol \mu}}$ MAGNETIC MOMENT ANOMALY
The parity-violating decay of muons in a storage ring is observed. The difference frequency $\omega _{\mathit a}$ between the muon spin precision and the orbital angular frequency (${{\mathit e}}/{\mathit m}_{{{\mathit \mu}}}\mathit c)\langle{}\mathit B\rangle{}$ is measured, as is the free proton NMR frequency $\omega _{{{\mathit p}}}$, thus determining the ratio $\mathit R=\omega _{\mathit a}/\omega _{{{\mathit p}}}$. Given the magnetic moment ratio $\lambda =\mu _{{{\mathit \mu}}}/\mu _{{{\mathit p}}}$ (from hyperfine structure in muonium), ($\mathit g−$2)/2 = $\mathit R/(\lambda −\mathit R$).
${{\boldsymbol \mu}_{{\mu}}}/({{\boldsymbol e}}\hbar{}/2{{\boldsymbol m}_{{\mu}}})−$1 = (${{\boldsymbol g}_{{\mu}}}−$2)/2
INSPIRE search
$11659208.9$ $\pm5.4$ $\pm3.3$ |
1 |
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MUG2 |
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• • • We do not use the following data for averages, fits, limits, etc. • • • |
$11659208$ $\pm6$ |
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MUG2 |
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$11659214$ $\pm8$ $\pm3$ |
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MUG2 |
- |
$11659203$ $\pm6$ $\pm5$ |
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MUG2 |
+ |
$11659204$ $\pm7$ $\pm5$ |
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MUG2 |
+ |
$11659202$ $\pm14$ $\pm6$ |
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MUG2 |
+ |
$11659191$ $\pm59$ |
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MUG2 |
+ |
$11659100$ $\pm110$ |
2 |
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CNTR |
+ |
$11659360$ $\pm120$ |
2 |
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CNTR |
- |
$11659230$ $\pm85$ |
2 |
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CNTR |
$\pm{}$ |
$11620000$ $\pm5000$ |
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CNTR |
+ |
1
BENNETT 2006 reports (${{\mathit g}_{{\mu}}}−$2)/2 = ($11659208.0$ $\pm5.4$ $\pm3.3$) $ \times 10^{-10}$. We rescaled this value using ${{\mathit \mu}}/{{\mathit p}}$ magnetic moment ratio of 3.183345137(85) from MOHR 2008 .
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2
BAILEY 1979 values recalculated by HUGHES 1999 using the COHEN 1987 ${{\mathit \mu}}/{{\mathit p}}$ magnetic moment. The improved MOHR 1999 value does not change the result.
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References: |
| PR D73 072003 |
Final Report of the E821 Muon Anomalous Magnetic Moment Measurement at BNL |
| PRL 92 161802 |
Measurement of the Negative Muon Anomalous Magnetic Moment to 0.7 ppm |
| PRL 89 101804 |
Measurement of the Positive Muon Anomalous Magnetic Moment to 0.7 ppm |
| PRL 86 2227 |
Precise Measurement of the Positive Muon Anomalous Magnetic Moment |
| PR D62 091101 |
Improved Measurement of the Positive Muon Anomalous Magnetic Moment |
| NP B150 1 |
Final Report on the CERN Muon Storage Ring Including the Anomalous Magnetic Moment and the Electric Dipole Moment of the Muon, and a Direct Test of Relativistic Time Dilation |
| PL 1 16 |
A New Measurement of the Anomalous Magnetic Moment of the Muon |
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