Eight-component two-fermion equations

Details Eight-component two-fermion equations Eight-component two-fermion equations

1998-02-03

arxiv.org/abs/hep-ph/9802233v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revtex, accepted for publication in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.57.3268

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 which is symmetric in the total cms energy. It allows the extension of recent \alpha^6 recoil corrections to the positronium case, and implies new recoil corrections to the fine and hyperfine structures and to the Bethe logarithm.

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