Antiproton collisions with excited positronium

M. Charlton, H. B. Ambalampitiya, I. I. Fabrikant, I. Kalinkin, D. V. Fursa, A. S. Kadyrov, and I. Bray
Phys. Rev. A 107, 012814 – Published 19 January 2023

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.

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  • Received 6 November 2022
  • Accepted 5 January 2023

DOI:https://doi.org/10.1103/PhysRevA.107.012814

©2023 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

M. Charlton

  • Department of Physics, Faculty of Science and Engineering, Swansea University, Swansea SA2 8PP, United Kingdom

H. B. Ambalampitiya

  • Quantemol Ltd., 320 City Rd, London EC1V 2NZ, UK and Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588-0299, USA

I. I. Fabrikant

  • Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588-0299, USA

I. Kalinkin, D. V. Fursa, A. S. Kadyrov, and I. Bray

  • Curtin Institute for Computation and Department of Physics and Astronomy, Curtin University, GPO Box U1987, Perth WA 6845, Australia

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Issue

Vol. 107, Iss. 1 — January 2023

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