Quantum electrodynamics at short distances and the stability of the vacuum
B H Kellett; B H Kellett; School of Phys., Univ. of Melbourne, Parkville, Vic., Australia
Журнал:
Journal of Physics G: Nuclear Physics
Дата:
1979-04-01
Аннотация:
It is shown that the invariant charge of quantum electrodynamics cannot change sign as a function of q<sup>2</sup>. Asymptotically, the invariant charge is given by a non-linear equation that has no real and negative solutions. Contrary to the indications from low-order perturbation theory, therefore, the invariant charge is everywhere non-negative, and the vacuum does not become unstable.
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