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“Challenging Matter-Antimatter Symmetry:
High-Precision Comparisons of the Fundamental Properties
of the Antiproton and the Proton”
Thursday, 06. Dec. 2018
Video-Recording for any system with MP4-support
- Video.mp4 (ca.393 Mb)
15:15 – 16:15
According to the Standard Model of particle physics, which is the condensate of all
human knowledge about the clockwork of nature, the Big Bang has produced equal
amounts of matter and antimatter. On the other hand, cosmological observations imply
that the visible part of the universe is entirely made out of matter. This striking
inconsistency, one of the hottest topics of modern physics, inspires experiments to
compare the fundamental properties of matter-antimatter conjugates at lowest energy
and with great precision.
The BASE collaboration at the CERN antiproton decelerator is performing such
high-precision comparisons with protons and antiprotons. Using advanced, ultra-stable,
cryogenic particle traps and superconducting detectors with single particle sensitivity,
we have performed the most precise measurement of the proton-to-antiproton charge-
to-mass ratio with a fractional precision of 11 significant digits . In another
measurement, we have invented a novel spectroscopy method, which allowed for the
first ultra-high precision measurement of the antiproton magnetic moment with a
fractional precision of 1.5 parts in a billion . Together with our recent measurement
of the proton magnetic moment  this improves the precision of previous
experiments  by more than a factor of 3000. At the currently reached level of precision,
our results support matter-antimatter symmetry.
In my talk I will review the recent achievements of BASE and will outline strategies to
further improve our high-precision studies of matter-antimatter symmetry.
 S. Ulmer et al., Nature 524, 196 (2015).
 C. Smorra et al., Eur. Phys. Journ. Spec. Top. 224, 16 (2015).
 G. Schneider et al., Science 358, 1081 (2017).
 J. DiSciacca et al., Phys. Rev. Lett. 110, 130801 (2013).
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