Phys. Rev. A 57, 3268–3275 (1998)Eight-component two-fermion equationsSee Also: Erratum Received 17 November 1997; published in the issue dated May 1998 An eight-component formalism is proposed for the relativistic two-fermion problem. In QED it extends the applicability of the Dirac equation with hyperfine interaction to the positronium case. The use of exact relativistic two-body kinematics entails a CP-invariant spectrum that is symmetric in the total center-of-mass system energy. It allows the extension of recent α6 recoil corrections to the positronium case and implies recoil corrections to the fine and hyperfine structures and to the Bethe logarithm. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.57.3268
DOI:
10.1103/PhysRevA.57.3268
PACS:
03.65.Pm
See AlsoErratum: Ruth Häckl, Viktor Hund, and Hartmut Pilkuhn, Erratum: Eight-component two-fermion equations [Phys. Rev. A 57, 3268 (1998)], Phys. Rev. A 60, 725 (1999). |
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