On balanced Hermitian threefolds with parallel Bismut torsion

Abstract: We continue our study on Hermitian manifolds that are {\em Bismut torsion parallel,} or {\em BTP} for brevity, which means that the Bismut connection has parallel torsion tensor. For $n\geq 3$, BTP metrics can be balanced (and non-K\"ahler). In this paper, we give a classification of all compact, balanced BTP threefolds.