2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/149269A recently proposed variation on the usual procedure to perform the topological B-twist in rigid $N=2$ models is applied to the case of the $σ$ model on a Kähler manifold. This leads to an alternative description of Witten's topological $σ$ model, which allows for a proper BRST interpretation and ghost number assignement. We also show that the auxiliary fields, which are responsible for the off shell closure of the $N=2$ algebra, play an important role in our construction.one reference addedHigh Energy Physics - Theorytext