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Measurement of the Principal Quantum Number Distribution in a Beam of Antihydrogen Atoms

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arxiv 2008.04246 v2 pith:QUJSP27F submitted 2020-08-10 physics.atom-ph

Measurement of the Principal Quantum Number Distribution in a Beam of Antihydrogen Atoms

classification physics.atom-ph
keywords antihydrogenatomsbeamdistributionmeasurementnumberquantumstate
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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.

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