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One-Particle Measurement of the Antiproton Magnetic Moment
The antiproton $(\bar{p})$ magnetic moment $\mu \bar{p} = \mu_{\bar{p}} S/(\bar{h}/2)$ is proportional to its spin $S$. A single trapped $\bar{p}$ is used for the first time to measure the $\bar{p}$ magnetic moment in nuclear magnetons, giving $\mu_\bar{p}/\mu N = -2.792 845 \pm 0.000 012$. The 4.4...
| Autores principales: | , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2013
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| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevLett.110.130801 http://cds.cern.ch/record/1510452 |
| _version_ | 1780927865051676672 |
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| author | DiSciacca, J. Marshall, M. Marable, K. Gabrielse, G. Ettenauer, S. Tardiff, E. Kalra, R. Fitzakerley, D.W. George, M.C. Hessels, E.A. Storry, C.H. Weel, M. Grzonka, D. Oelert, W. Sefzick, T. |
| author_facet | DiSciacca, J. Marshall, M. Marable, K. Gabrielse, G. Ettenauer, S. Tardiff, E. Kalra, R. Fitzakerley, D.W. George, M.C. Hessels, E.A. Storry, C.H. Weel, M. Grzonka, D. Oelert, W. Sefzick, T. |
| author_sort | DiSciacca, J. |
| collection | CERN |
| description | The antiproton $(\bar{p})$ magnetic moment $\mu \bar{p} = \mu_{\bar{p}} S/(\bar{h}/2)$ is proportional to its spin $S$. A single trapped $\bar{p}$ is used for the first time to measure the $\bar{p}$ magnetic moment in nuclear magnetons, giving $\mu_\bar{p}/\mu N = -2.792 845 \pm 0.000 012$. The 4.4 parts per million (ppm) uncertainty is 680 times smaller than previously realized. Comparing to the proton moment $\mu_{p} = \mu_{p} S/\bar{h}/2)$ measured using the same method and trap electrodes gives $\mu_{\bar{p}}/\mu_{p} = -1.000 000 \pm 0.000 005$ to 5 ppm, consistent with the prediction of the CPT theorem. |
| id | cern-1510452 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2013 |
| record_format | invenio |
| spelling | cern-15104522022-03-23T03:23:16Zdoi:10.1103/PhysRevLett.110.130801http://cds.cern.ch/record/1510452engDiSciacca, J.Marshall, M.Marable, K.Gabrielse, G.Ettenauer, S.Tardiff, E.Kalra, R.Fitzakerley, D.W.George, M.C.Hessels, E.A.Storry, C.H.Weel, M.Grzonka, D.Oelert, W.Sefzick, T.One-Particle Measurement of the Antiproton Magnetic MomentOther Fields of PhysicsOther Fields of PhysicsThe antiproton $(\bar{p})$ magnetic moment $\mu \bar{p} = \mu_{\bar{p}} S/(\bar{h}/2)$ is proportional to its spin $S$. A single trapped $\bar{p}$ is used for the first time to measure the $\bar{p}$ magnetic moment in nuclear magnetons, giving $\mu_\bar{p}/\mu N = -2.792 845 \pm 0.000 012$. The 4.4 parts per million (ppm) uncertainty is 680 times smaller than previously realized. Comparing to the proton moment $\mu_{p} = \mu_{p} S/\bar{h}/2)$ measured using the same method and trap electrodes gives $\mu_{\bar{p}}/\mu_{p} = -1.000 000 \pm 0.000 005$ to 5 ppm, consistent with the prediction of the CPT theorem.For the first time a single trapped antiproton (p¯) is used to measure the p¯ magnetic moment μp¯. The moment μp¯=μp¯S/(ℏ/2) is given in terms of its spin S and the nuclear magneton (μN) by μp¯/μN=-2.792 845±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 μp¯/μp=-1.000 000±0.000 005 to 5 ppm, for a proton moment μp=μpS/(ℏ/2), consistent with the prediction of the CPT theorem.\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.arXiv:1301.6310oai:cds.cern.ch:15104522013-01-29 |
| spellingShingle | Other Fields of Physics Other Fields of Physics DiSciacca, J. Marshall, M. Marable, K. Gabrielse, G. Ettenauer, S. Tardiff, E. Kalra, R. Fitzakerley, D.W. George, M.C. Hessels, E.A. Storry, C.H. Weel, M. Grzonka, D. Oelert, W. Sefzick, T. One-Particle Measurement of the Antiproton Magnetic Moment |
| title | One-Particle Measurement of the Antiproton Magnetic Moment |
| title_full | One-Particle Measurement of the Antiproton Magnetic Moment |
| title_fullStr | One-Particle Measurement of the Antiproton Magnetic Moment |
| title_full_unstemmed | One-Particle Measurement of the Antiproton Magnetic Moment |
| title_short | One-Particle Measurement of the Antiproton Magnetic Moment |
| title_sort | one-particle measurement of the antiproton magnetic moment |
| topic | Other Fields of Physics Other Fields of Physics |
| url | https://dx.doi.org/10.1103/PhysRevLett.110.130801 http://cds.cern.ch/record/1510452 |
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