Deduction of the quantum unmbers of low-lying states of the (e+e+e-e-) system from symmetry consideration

Details Deduction of the quantum unmbers of low-lying states of the (e+e+e-e-) system from symmetry consideration Deduction of the quantum unmbers of low-lying states of the (e+e+e-e-) system from symmetry consideration

1998-05-04

arxiv.org/abs/physics/9805008v1

Phys.Lett. A243 (1998) 215-222

Physics

Atomic Physics

12 pages, 5 tables, no figures

Scientific paper

10.1016/S0375-9601(98)00192-3

The feature of the low-lying spectrum and a complete set of quantum numbers of the (e+e+e-e-) system have been deduced based on symmetry consideration. The existence of a low odd-parity L=1 excited state with the spins of the two electrons coupled to s1=1 and the two positrons coupled to s2=0 (or s1=0 and s2=1) and a low even-parity L=0 excited state with s1=s2=1 have been predicted. The discussion is generalized to 2-dimensional (e+e+e-e-) systems.

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