N=1 superfield description of vector-tensor couplings in six dimensions

Understand

We express supersymmetric couplings among the vector and the tensor multiplets in six dimensions (6D) in terms of N=1 superfields.

• The superfield description is derived from the invariant action in the projective superspace.
• The obtained expression is consistent with the known superfield actions of 6D supersymmetric gauge theory and 5D Chern-Simons theory after the dimensional reduction.
• Our result provides a crutial clue to the N=1 superfield description of 6D supergravity.