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

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  • B. Kolbinger, CERN, European Organization for Nuclear Research (CERN), PH Dept, Austrian Academy of Sciences
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  • C. Amsler, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys
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  • S. Arguedas Cuendis, CERN, European Organization for Nuclear Research (CERN), PH Dept, Austrian Academy of Sciences
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  • H. Breuker, RIKEN, RIKEN, Ulmer Fundamental Symmetries Lab
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  • A. Capon, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys
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  • G. Costantini, INFN, Istituto Nazionale di Fisica Nucleare (INFN), Sez Pavia, Università degli Studi di Brescia
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  • P. Dupre, RIKEN, RIKEN, Ulmer Fundamental Symmetries Lab
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  • M. Fleck, Univ Tokyo, University of Tokyo, Grad Sch Arts & Sci, Inst Phys
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  • A. Gligorova, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys
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  • H. Higaki, Hiroshima Univ, Hiroshima University, Grad Sch Adv Sci & Engn
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  • Y. Kanai, RIKEN Nishina Ctr Accelerator Based Sci, RIKEN
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  • V. Kletzl, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys
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  • N. Kuroda, Univ Tokyo, University of Tokyo, Grad Sch Arts & Sci, Inst Phys
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  • A. Lanz, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys
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  • M. Leali, INFN, Istituto Nazionale di Fisica Nucleare (INFN), Sez Pavia, Università degli Studi di Brescia
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  • V. Mackel, RIKEN, RIKEN, Ulmer Fundamental Symmetries Lab
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  • C. Malbrunot, CERN, European Organization for Nuclear Research (CERN), PH Dept
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  • V. Mascagna, Univ Insubria, University of Insubria, Dipartimento Sci & Alta Tecnol
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  • O. Massiczek, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys
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  • Y. Matsuda, Univ Tokyo, University of Tokyo, Grad Sch Arts & Sci, Inst Phys
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  • D. J. Murtagh, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys
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  • Y. Nagata, Tokyo Univ Sci, Tokyo University of Science, Dept Phys
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  • A. Nanda, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys
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  • L. Nowak, CERN, European Organization for Nuclear Research (CERN), PH Dept
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  • B. Radics, RIKEN, RIKEN, Ulmer Fundamental Symmetries Lab
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  • C. Sauerzopf, Austrian Academy of Sciences
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  • M. C. Simon, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys
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  • M. Tajima, RIKEN Nishina Ctr Accelerator Based Sci, RIKEN
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  • H. A. Torii, Univ Tokyo, University of Tokyo, Sch Sci, Dept Astron, Bunkyo Ku
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  • U. Uggerhoj
  • S. Ulmer, RIKEN, RIKEN, Ulmer Fundamental Symmetries Lab
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  • L. Venturelli, INFN, Istituto Nazionale di Fisica Nucleare (INFN), Sez Pavia, Università degli Studi di Brescia
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  • A. Weiser, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys
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  • M. Wiesinger, Austrian Academy of Sciences
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  • E. Widmann, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys
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  • T. Wolz, CERN, European Organization for Nuclear Research (CERN), PH Dept
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  • Y. Yamazaki, RIKEN, RIKEN, Ulmer Fundamental Symmetries Lab
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  • J. Zmeskal, Austrian Acad Sci, Austrian Academy of Sciences, Stefan Meyer Inst Subat Phys

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 10-6 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.

OriginalsprogEngelsk
Artikelnummer91
TidsskriftEuropean Physical Journal D
Vol/bind75
Nummer3
Antal sider14
ISSN1434-6060
DOI
StatusUdgivet - mar. 2021

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