In majority of literature (I studied recently the paper by V. I. Stragev and L. M. Tomilchikin Soviet Physical Yspexi v. 4 p 187, year 1973 and also R. V. Tevikyan in Soviet Physics JETP v 24 p 791) it is believed that the only the value h=\sqrt (e^2+g^2) [electric and magnetic charges, respectively] is observable value. In particular, it is argued by Tevikyan that P and T parities are not conserved for (sin \theta)=g/h \neq 0 and this implies immediately that e and g are unobservable.
Moreover, it is possible (as V. I. Stragev and L. M. Tomilchikin assert) always to construct the Maxwell tensor h F and its dual h \tilde F (in turn, these tensors are specific linear combinations of the usual Maxwell tensors F and \tilde F with sin \theta and cos \theta as coefficients) in such a way that only the one current (1/h) J\mu =\partial \nu F \mu \nu exists in the model considered. Thus by such arguments it is the one current model.
This is correct with only very important proviso ( V. I. Stragev and L. M. Tomilchikin), that the ratio g/e is constant across the model. But if g1/e1 \neq g2/e2 and so on, the dyons with both electric e' and magnetic g' charges will exist with
e'=h2 cos (\theta 2- \theta 1);
g' =h2 sin (\theta 2- \theta 1),
where h2=\sqrt (e2^2+g2^2); \theta i= arctg (gi/ei) [i=1,2].
My question in connection with the said is the following: can the particles belonging to different topologies n be treated as those belonging to different (equivalence) classes by the e'/g' ratio. This legalize the Dirac quantization paradigm.
My interest to the two charge model is asoociated with my recent paper "Topological Dirac variables in Abelian U(1) theory" (arXiv:1406.0160 ), where in Section 3 I analize the Dirac paradigm. In particular, I suppose (and this is natural, at first sight) that in the trivial topological sector of the Abelian U(1) theory (n=0), it is possible the "purely magnetic" configuration e=0 and g taking any value (due to the 0/0 uncertainty). I have referred to such "purely magnetic" particles as to magnons in the cited article.
And last, in Section 3 of arXiv:1406.0160 there are lot of interesting nuances which I would like to bring to the broad discussion. Thank you for your attention.
http://arxiv.org/abs/1406.0160
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