Laser-assisted charge transfer in positronium collisions with protons and antiprotons

Ambalampitiya, Harindranath; Stallbaumer, J.; Fabrikant, I. I.

doi:10.1103/physreva.105.043111

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B Ctmc1

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2023

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“…[29,30]. The CTMC approach has been applied before in the case of a Ps atom interacting with a proton [18,19,24,31], and recently extended to the laser-assisted case [32]. The theory is described in brief as follows.…”

Section: B Ctmcmentioning

confidence: 99%

Antiproton collisions with excited positronium

Charlton

Ambalampitiya²,

Fabrikant³

et al. 2023

Phys. Rev. A

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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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