Elastic scattering of positronium: Application of the confined variational method

Abstract
We demonstrate for the first time that the phase shift in elastic positronium-atom scattering can be precisely determined by the confined variational method, in spite of the fact that the Hamiltonian includes an unphysical confining potential acting on the center of mass of the positron and one of the atomic electrons. As an example, we study the S-wave elastic scattering for the positronium-hydrogen scattering system, where the existing 4% discrepancy between the Kohn variational calculation and the R-matrix calculation is resolved. © Copyright EPLA, 2012.

Citation
Zhang, J.-Y., Yan, Z.-C., & Schwingenschlögl, U. (2012). Elastic scattering of positronium: Application of the confined variational method. EPL (Europhysics Letters), 99(4), 43001. doi:10.1209/0295-5075/99/43001

Acknowledgements
The authors are thankful for the computational resources provided by ACEnet of Canada and HPC of KAUST. Z-CY was supported by NSERC of Canada and in part by the Chinese Academy of Sciences CAS/SAFEA International Partnership Program for Creative Research Teams.

Publisher
IOP Publishing

Journal
EPL (Europhysics Letters)

DOI
10.1209/0295-5075/99/43001

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