O3/O7 Orientifold Truncations and Very Special Quaternionic-Kähler Geometry
نویسندگان
چکیده
We study the orientifold truncation that arises when compactifying type II string theory on Calabi-Yau orientifolds with O3/O7-planes, in the context of supergravity. We look at the N=2 to N=1 reduction of the hypermultiplet sector of N=2 supergravity under the truncation, for the case of very special quaternionic-Kähler target space geometry. We explicitly verify the Kähler structure of the truncated spaces, and we study the truncated isometry algebra. For symmetric special quaternionic spaces, we give a complete overview of the spaces one finds after truncation. We also find new examples of ‘dual’ Kähler spaces, that give rise to flat potentials in N=1 supergravity. † {geert.smet, joris.vandenbergh}@fys.kuleuven.ac.be
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