A parts-per-billion measurement of the antiproton magnetic moment. Smorra, C., Sellner, S., Borchert, M., Harrington, J., 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. Nature, 550(7676):371-374, Nature Publishing Group, 10, 2017. Paper Website abstract bibtex Comparing the fundamental properties of normal-matter particles with their antimatter counterparts tests charge parity time (CPT) invariance, which is an important part of the standard model of particle physics. Many properties have been measured to the parts-per-billion level of uncertainty, but the magnetic moment of the antiproton has not. Christian Smorra and colleagues have now done so, and report that it is 2.7928473441 0.0000000042 in units of the nuclear magneton. This is consistent with the magnetic moment of the proton, 2.792847350 0.000000009 in the same units. Assuming CPT invariance, these two values should be the same, except for the difference in sign, so this result provides a more stringent constraint on certain CPT-violating effects.
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title = {A parts-per-billion measurement of the antiproton magnetic moment},
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abstract = {Comparing the fundamental properties of normal-matter particles with their antimatter counterparts tests charge parity time (CPT) invariance, which is an important part of the standard model of particle physics. Many properties have been measured to the parts-per-billion level of uncertainty, but the magnetic moment of the antiproton has not. Christian Smorra and colleagues have now done so, and report that it is 2.7928473441 0.0000000042 in units of the nuclear magneton. This is consistent with the magnetic moment of the proton, 2.792847350 0.000000009 in the same units. Assuming CPT invariance, these two values should be the same, except for the difference in sign, so this result provides a more stringent constraint on certain CPT-violating effects.},
bibtype = {article},
author = {Smorra, C. and Sellner, S. and Borchert, M.J. and Harrington, J.A. and Higuchi, T. and Nagahama, H. and Tanaka, T. and Mooser, A. and Schneider, G. and Bohman, M. and Blaum, K. and Matsuda, Y. and Ospelkaus, C. and Quint, W. and Walz, J. and Yamazaki, Y. and Ulmer, S.},
journal = {Nature},
number = {7676}
}
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