DUAL HIGGS-MODEL WITH DUAL DIRAC STRINGS

We investigate a dual Higgs model with dual Dirac strings invariant un der U(1) gauge transformations, where U(1) is the Abelian gauge group of dual-vector potential transformations spontaneously broken by the H iggs mechanism. The action of a dual Dirac string calculated in leadin g order in the large Higgs field mass expansion coincides with a dual version of that obtained by Nambu. For the example of the string tensi on at the classical tree-level approach we develop a procedure for the computation of contributions of string-string interactions. Non-pertu rbative phenomena of compact QED are discussed.