Off-shell structure of twisted (2,0) theory

A Q-exact off-shell action is constructed for twisted abelian (2,0) theory on a Lorentzian six-manifold of the form M1,5 = C × M4, where C is a flat two-manifold and M4 is a general Euclidean four-manifold. The properties of this formulation, which is obtained by introducing two auxiliary fields, can be summarised by a commutative diagram where the Lagrangian and its stress-tensor arise from the Q-variation of two fermionic quantities V and λμν. This completes and extends the analysis in [1].