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Antiproton collisions with excited positronium

Michael Charlton, H. B. Ambalampitiya Orcid Logo, I. I. Fabrikant Orcid Logo, I. Kalinkin, D. V. Fursa Orcid Logo, A. S. Kadyrov Orcid Logo, I. Bray Orcid Logo

Physical Review A, Volume: 107, Issue: 1

Swansea University Author: Michael Charlton

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DOI (Published version): 10.1103/physreva.107.012814

Abstract

We present results of calculations of several processes resulting from positronium (Ps) collisions with antiprotons: antihydrogen formation, Ps breakup, and nPs-changing collisions. Calculations utilize the quantum convergent close-coupling (CCC) method and the classical trajectory Monte Carlo (CTMC...

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Published in: Physical Review A
ISSN: 2469-9926 2469-9934
Published: American Physical Society (APS) 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa62580
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Abstract: We present results of calculations of several processes resulting from positronium (Ps) collisions with antiprotons: antihydrogen formation, Ps breakup, and nPs-changing collisions. Calculations utilize the quantum convergent close-coupling (CCC) method and the classical trajectory Monte Carlo (CTMC) method. We identify a region of Ps principal quantum numbers nPs and Ps energies where the classical description is valid and where the CCC calculations become computationally too expensive. This allows us to present the most complete and reliable set of cross sections in a broad range of nPs and initial orbital momentum quantum numbers lPs which are necessary for experiments with antihydrogen at CERN.
College: Faculty of Science and Engineering
Funders: The Curtin authors acknowledge the Texas Advanced Computing Center (TACC) at The University of Texas. , the Australasian Leadership Computing Grants scheme of the National Computing Infrastructure, and The Pawsey Supercomputer Center for providing HPC resources, and also the support of the Australian Research Council. M.C. thanks the EPSRC (UK) for supporting his antihydrogen research. H.A. and I.I.F. were supported by the US National Science Foundation under Grant No. PHY-1803744 and by resources of the Holland Computing Center of the University of Nebraska, which receives support from the Nebraska Research Initiative.
Issue: 1

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