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M-Theory and Orientifolds

Braun, Andreas P.

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We construct the M-Theory lifts of type IIA orientifolds based on K3-fibred Calabi-Yau threefolds with compatible involutions. Such orientifolds are shown to lift to M-Theory on twisted connected sum G2 manifolds. Beautifully, the two building blocks forming the G2 manifold correspond to the open and closed string sectors. As an application, we show how to use such lifts to explicitly study open string moduli. Finally, we use our analysis to construct examples of G2 manifolds with different inequivalent TCS realizations.


Braun, A. P. (2020). M-Theory and Orientifolds. Journal of High Energy Physics, 2020(09), Article 65.

Journal Article Type Article
Acceptance Date Aug 10, 2020
Publication Date Sep 8, 2020
Deposit Date Aug 20, 2020
Publicly Available Date Sep 17, 2020
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2020
Issue 09
Article Number 65
Publisher URL https:/


Published Journal Article (553 Kb)

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Copyright Statement
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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