English

Consistency Conditions for Orientifolds and D-Manifolds

High Energy Physics - Theory 2009-10-09 v3

Abstract

We study superstrings with orientifold projections and with generalized open string boundary conditions (D-branes). We find two types of consistency condition, one related to the algebra of Chan-Paton factors and the other to cancellation of divergences. One consequence is that the Dirichlet 5-branes of the Type I theory carry a symplectic gauge group, as required by string duality. As another application we study the Type I theory on a K3K3 Z2Z_2 orbifold, finding a family of consistent theories with various unitary and symplectic subgroups of U(16)×U(16)U(16) \times U(16). We argue that the K3K3 orbifold with spin connection embedded in gauge connection corresponds to an interacting conformal field theory in the Type I theory.

Cite

@article{arxiv.hep-th/9601038,
  title  = {Consistency Conditions for Orientifolds and D-Manifolds},
  author = {Eric G. Gimon and Joseph Polchinski},
  journal= {arXiv preprint arXiv:hep-th/9601038},
  year   = {2009}
}

Comments

Reference added. 27 pages LaTeX, 2 epsf figures. To appear in Phys.Rev.D (15Jly96)