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BASE: the Baryon Antibaryon Symmetry Experiment

The Baryon Antibaryon Symmetry Experiment (BASE) aims at performing a stringent test of the combined charge parity and time reversal (CPT) symmetry by comparing the magnetic moments of the proton and the antiproton with high precision. Using single particles in a Penning trap, the proton/antiproton...

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Bibliographic Details
Main Authors: Smorra, Christian (Author) , Blaum, Klaus (Author) , Bojtar, L. (Author) , Borchert, M. (Author) , Franke, K.A. (Author) , Higuchi, T. (Author) , Leefer, N. (Author) , Nagahama, H. (Author) , Matsuda, Y. (Author) , Mooser, A. (Author) , Niemann, M. (Author) , Ospelkaus, C. (Author) , Quint, Wolfgang (Author) , Schneider, G. (Author) , Sellner, S. (Author) , Tanaka, T. (Author) , Van Gorp, S. (Author) , Walz, J. (Author) , Yamazaki, Y. (Author) , Ulmer, S. (Author)
Format: Article (Journal)
Language:English
Published: 23 November 2015
In: European physical journal special topics
Year: 2015, Volume: 224, Issue: 16, Pages: 3055-3108
ISSN:1951-6401
DOI:10.1140/epjst/e2015-02607-4
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjst/e2015-02607-4
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Author Notes:C. Smorra, K. Blaum, L. Bojtar, M. Borchert, K.A. Franke, T. Higuchi, N. Leefer, H. Nagahama, Y. Matsuda, A. Mooser, M. Niemann, C. Ospelkaus, W. Quint, G. Schneider, S. Sellner, T. Tanaka, S. Van Gorp, J. Walz, Y. Yamazaki, and S. Ulmer
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Summary:The Baryon Antibaryon Symmetry Experiment (BASE) aims at performing a stringent test of the combined charge parity and time reversal (CPT) symmetry by comparing the magnetic moments of the proton and the antiproton with high precision. Using single particles in a Penning trap, the proton/antiproton g-factors, i.e. the magnetic moment in units of the nuclear magneton, are determined by measuring the respective ratio of the spin-precession frequency to the cyclotron frequency. The spin precession frequency is measured by non-destructive detection of spin quantum transitions using the continuous Stern-Gerlach effect, and the cyclotron frequency is determined from the particle*s motional eigenfrequencies in the Penning trap using the invariance theorem. By application of the double Penning-trap method we expect that in our measurements a fractional precision of δg/g 10−9 can be achieved. The successful application of this method to the antiproton will consist a factor 1000 improvement in the fractional precision of its magnetic moment. The BASE collaboration has constructed and commissioned a new experiment at the Antiproton Decelerator (AD) of CERN. This article describes and summarizes the physical and technical aspects of this new experiment.
Item Description:Gesehen am 18.06.2020
Physical Description:Online Resource
ISSN:1951-6401
DOI:10.1140/epjst/e2015-02607-4

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