Construction of 6D supersymmetric field models in N=(1,0)N=(1,0) harmonic superspace

We consider the six-dimensional hypermultiplet, vector and tensor multiplet models in (1,0)(1,0) harmonic superspace and discuss the corresponding superfield actions. The actions for free (2,0)(2,0) tensor multiplet and for interacting vector/tensor multiplet system are constructed. Using the superfield formulation of the hypermultiplet coupled to the vector/tensor system we develop an approach to calculation of the one-loop superfield effective action and find its divergent structure.