Orientifold points in M theory

Amihay Hanany, Barak Kol*, Arvind Rajaraman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


We identify the lift to M theory of the four types of orientifold points, and show that they involve a chiral fermion on an orbifold fixed circle. From this lift, we compute the number of normalizable ground states for the SO(7V) and Sp(7V) supersymmetric quantum mechanics with sixteen supercharges. The results agree with known results obtained by the mass deformation method. The mass of the orientifold is identified with the Casimir energy.

Original languageAmerican English
Pages (from-to)XXXVII-9
JournalJournal of High Energy Physics
Issue number10
StatePublished - 1999
Externally publishedYes


  • D-branes
  • M(atrix) Theories
  • M-Theory


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