| Zugriffsnummer | 41035 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | A parts-per-billion measurement of the antiproton magnetic moment |
| Autor(in); Institution |
Smorra, C.; Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, JAPAN; CERN, Geneva, SWITZERLAND
Sellner, S.; Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, JAPAN
Borchert, M. J.; Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, JAPAN; Leibniz Universität Hannover, Institut für Quantenoptik, Hannover, GERMANY
Harrington, J. A.; Max-Planck-Institut für Kernphysik, Heidelberg, GERMANY
Higuchi, T.; Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, JAPAN; University of Tokyo, Graduate School of Arts and Sciences, Tokyo, JAPAN
Nagahama, H.; Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, JAPAN
Tanaka, T.; Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, JAPAN; University of Tokyo, Graduate School of Arts and Sciences, Tokyo, JAPAN
Mooser, A.; Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, JAPAN
Schneider, G.; Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, JAPAN; Johannes Gutenberg-Universität, Institut für Physik, Mainz, GERMANY
Bohman, M.; Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, JAPAN; Max-Planck-Institut für Kernphysik, Heidelberg, GERMANY
Blaum, K.; Max-Planck-Institut für Kernphysik, Heidelberg, GERMANY
Matsuda, Y.; University of Tokyo, Graduate School of Arts and Sciences, Tokyo, JAPAN
Ospelkaus, Christian; QUEST Institute for Experimental Quantum Metrology, PTB-Braunschweig; Leibniz Universität, Institut für Quantenoptik Hannover, GERMANY
Quint, W.; GSI - Helmholtzzentrum für Schwerionenforschung, Darmstadt, GERMANY
Walz, J.; Johannes Gutenberg-Universität, Institut für Physik, Mainz, GERMANY; Helmholtz-Institut Mainz, Mainz, GERMANY
Yamazaki, Y.; Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, JAPAN
Ulmer, S.; Ulmer Fundamental Symmetries Laboratory, RIKEN, Wako, JAPAN
|
| Quelle/Jahr | Nature: 550 (2017), 7676, 371 - 374 |
| Artikelnummer | 24048 |
| ISSN | 0028-0836 (PRINT) ; 1476-4687 (ONLINE) |
| DOI | |
| Verlag | Switzerland: Springer Publishing Group |
| Freie Schlagworte | CPT ; mesons ; leptons ; baryons ; high precisions measurements |
| Zusammenfassung | Precise comparisons of the fundamental properties of matter–antimatter conjugates provide sensitive tests of charge-parity-time (CPT) invariance, which is an important symmetry that rests on basic assumptions of the standard model of particle physics. Experiments on mesons, leptons and baryons have compared different properties of matter-antimatter conjugates with fractional uncertainties at the parts-per-billion level or better. One specific quantity, however, has so far only been known to a fractional uncertainty at the parts-per-million level: the magnetic moment of the antiproton, μp. The extraordinary difficulty in measuring μp with high precision is caused by its intrinsic smallness; for example, it is 660 times smaller than the magnetic moment of the positron. Here we report a high-precision measurement of μp in units of the nuclear magneton μN with a fractional precision of 1.5 parts per billion (68% confidence level). We use a two-particle spectroscopy method in an advanced cryogenic multi-Penning trap system. Our result μp = -2.7928473441(42)μN (where the number in parentheses represents the 68% confidence interval on the last digits of the value) improves the precision of the previous best μp measurement by a factor of approximately 350. The measured value is consistent with the proton magnetic moment, μp= 2.792847350(9)μN, and is in agreement with CPT invariance. Consequently, this measurement constrains the magnitude of certain CPT-violating effects to below 1.8 × 10-24 gigaelectronvolts, and a possible splitting of the proton-antiproton magnetic moments by CPT-odd dimension-five interactions to below 6 × 10-12 Bohr magnetons. |
| Kostenfreier Zugang | Open Access Hybrid |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Zeit und Frequenz |
Zitierung
Smorra, C., Sellner, S., Borchert, M. J., Harrington, J. A., Higuchi, T., Nagahama, H., Tanaka, T., Mooser, A., Schneider, G., Bohman, M., Blaum, K., Matsuda, Y., Ospelkaus, C., Quint, W., Walz, J., Yamazaki, Y., & Ulmer, S. (2017). A parts-per-billion measurement of the antiproton magnetic moment. Nature, 550(7676), 371–374. https://doi.org/10.1038/nature24048