  A hypothetic Hidden Sector of the Universe, consisting of sterile fermions
("sterinos") and sterile mediating bosons ("sterons") of mass dimension 1 (not
2!) - the last described by an antisymmetric tensor field - requires to exist
also a scalar isovector and scalar isoscalar in order to be able to construct
electroweak invariant coupling (before spontaneously breaking its symmetry).

High Energy Physics - Phenomenology