Sigma-model limit of Yang–Mills instantons in higher dimensions by Andreas Deser, Olaf Lechtenfeld, Alexander D. Popov

“…We consider the Hermitian Yang–Mills (instanton) equations for connections on vector bundles over a 2n-dimensional Kähler manifold X which is a product Y×Z of p- and q-dimensional Riemannian manifold Y and Z with p+q=2n. …”
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Deformed N=8 $$ \mathcal{N}=8 $$ mechanics of (8, 8, 0) multiplets by Evgeny Ivanov, Olaf Lechtenfeld, Stepan Sidorov

“…Using SU(4|1) chiral superfields, we derive invariant actions for the first-type (8, 8, 0) multiplet, which parametrizes special Kähler manifolds. Since we are not aware of a manifestly SU(4|1) covariant superfield formalism for the second-type (8, 8, 0) multiplet, we perform a general construction of SU(4|1) invariant actions for both multiplet types in terms of SU(2|1) superfields. …”
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