Measurement of the principal quantum number distribution in a beam of antihydrogen atoms

Aug 10, 2020
14 pages
Published in:
  • Eur.Phys.J.D 75 (2021) 3, 91
  • Published: Mar 8, 2021
e-Print:
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Abstract: (Springer)
The ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) collaboration plans to measure the ground-state hyperfine splitting of antihydrogen in a beam at the CERN Antiproton Decelerator with initial relative precision of 10610^{-6} or better, to test the fundamental CPT (combination of charge conjugation, parity transformation and time reversal) symmetry between matter and antimatter. This challenging goal requires a polarised antihydrogen beam with a sufficient number of antihydrogen atoms in the ground state. The first measurement of the quantum state distribution of antihydrogen atoms in a low magnetic field environment of a few mT is described. Furthermore, the data-driven machine learning analysis to identify antihydrogen events is discussed.[graphic not available: see fulltext][graphic not available: see fulltext]
Note:
  • 18 pages, 10 figures
  • antihydrogen
  • polarized beam
  • ground state: hyperfine structure
  • magnetic field: low
  • quantum number
  • antimatter
  • CERN Lab
  • ASACUSA
  • CPT
  • measurement methods