One-Particle Measurement of the Antiproton Magnetic Moment
| Autor: | Matthew Weel, C. H. Storry, S. Ettenauer, M. C. George, E. Tardiff, R. Kalra, Gerald Gabrielse, W. Oelert, M. Marshall, K. Marable, D. Grzonka, T. Sefzick, D. W. Fitzakerley, E. A. Hessels, Jack DiSciacca |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Physics
Particle physics Proton Magnetic moment Atomic Physics (physics.atom-ph) 010308 nuclear & particles physics Other Fields of Physics FOS: Physical sciences General Physics and Astronomy 01 natural sciences Physics - Atomic Physics Crystallography Antiproton 0103 physical sciences ddc:550 010306 general physics Nuclear magneton |
| Zdroj: | Physical review letters 110(13), 130801 (2013). doi:10.1103/PhysRevLett.110.130801 |
| Popis: | \DeclareRobustCommand{\pbar}{\HepAntiParticle{p}{}{}\xspace} \DeclareRobustCommand{\p}{\HepParticle{p}{}{}\xspace} \DeclareRobustCommand{\mup}{$\mu_{p}${}{}\xspace} \DeclareRobustCommand{\mupbar}{$\mu_{\pbar}${}{}\xspace} \DeclareRobustCommand{\muN}{$\mu_N${}{}\xspace For the first time a single trapped \pbar is used to measure the \pbar magnetic moment ${\bm\mu}_{\pbar}$. The moment ${\bm\mu}_{\pbar} = \mu_{\pbar} {\bm S}/(\hbar/2)$ is given in terms of its spin ${\bm S}$ and the nuclear magneton (\muN) by $\mu_{\pbar}/\mu_N = -2.792\,845 \pm 0.000\,012$. The 4.4 parts per million (ppm) uncertainty is 680 times smaller than previously realized. Comparing to the proton moment measured using the same method and trap electrodes gives $\mu_{\pbar}/\mu_p = -1.000\,000 \pm 0.000\,005$ to 5 ppm, for a proton moment ${\bm{\mu}}_{p} = \mu_{p} {\bm S}/(\hbar/2)$, consistent with the prediction of the CPT theorem. Comment: 4 pages, 4 figures. arXiv admin note: substantial text overlap with arXiv:1201.3038 |
| Databáze: | OpenAIRE |
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