Abstract
The double-tensor multiplet naturally appears in type IIB superstring compactifications
on Calabi-Yau threefolds, and is dual to the universal hypermultiplet. We revisit the
calculation of instanton corrections to the low-energy effective action, in the supergravity
approximation. We derive a Bogomol’nyi bound for the double-tensor multiplet and find
new instanton solutions saturating the bound. They
... read more
