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Anomalous states of positronium
2019
Physical Review A
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The energies and wave functions of the two-body Dirac equation for positronium are compared with those of the Pauli approximation and the Bethe-Salpeter equation. The unusual behavior of the ground-state wave function of the Dirac equation is explained in terms of anomalous bound-state solutions.
doi:10.1103/physreva.100.062128
fatcat:fe4dwajx3nf5binil43ibl7fiq