Éditeur(s) : HAL CCSDWorld Scientific Publishing Résumé : International audience We present a new, alternative interpretation of the vector-tensor multiplet as a two-form in central charge superspace. This approach provides a geometric description of the (nontrivial) central charge transformations ab initio and is naturally generalized to include couplings of Chern-Simons forms to the antisymmetric tensor gauge field, giving rise to a N=2 supersymmetric version of the Green-Schwarz anomaly cancellation mechanism. ISSN: 0217-751X
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