English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We study the orientifold truncation that arises when compactifying type IIstring theory on Calabi-Yau orientifolds with O3/O7-planes, in the context ofsupergravity. We look at the N=2 to N=1 reduction of the hypermultiplet sectorof N=2 supergravity under the truncation, for the case of very specialquaternionic-Kaehler target space geometry. We explicitly verify the Kaehlerstructure of the truncated spaces, and we study the truncated isometry algebra.For symmetric special quaternionic spaces, we give a complete overview of thespaces one finds after truncation. We also find new examples of dual Kaehlerspaces, that give rise to flat potentials in N=1 supergravity.Comment: 25 pages, LaTeX, v2:curvature tensor of the dual symmetric spaces  calculated, section 7 expanded, references added, v3:few typos fixed, version  to appear in Class.Quantum Gravit

O3/O7 orientifold truncations and very special quaternionic-Kähler geometry