Orientifolds with branes at angles

  title={Orientifolds with branes at angles},
  author={Stefan F{\"o}rste and Gabriele Honecker and Richard Schreyer},
We present supersymmetry breaking four dimensional orientifolds of type IIA strings. The compact space is a torus times a four dimensional orbifold. The orientifold group reflects one direction in each torus. RR tadpoles are cancelled by D6-branes intersecting at angles in the torus and in the orbifold. The angles are chosen such that supersymmetry is broken. The resulting four dimensional theories contain chiral fermions. The tadpole cancellation conditions imply that there are no non-abelian… CONTINUE READING
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