2D N=(4,4) superspace supergravity and bi-projective superfields

Understand

We propose a new superspace formulation for N=(4,4) conformal supergravity in two dimensions.

• This is based on a geometry where the structure group of the curved superspace is chosen to be SO(1,1) x SU(2)_L x SU(2)_R.
• The off-shell supergravity multiplet possesses super-Weyl transformations generated by an unconstrained real scalar superfield.
• The new supergravity formulation turns out to be an extension of the minimal multiplet introduced in 1988 by Gates et.