Orientifolds with discrete torsion

  title={Orientifolds with discrete torsion},
  author={Mathias Klein and Raul Rabadan},
  journal={Journal of High Energy Physics},
  • Mathias Klein, Raul Rabadan
  • Published 2000
  • Physics
  • Journal of High Energy Physics
  • We show how discrete torsion can be implemented in D = 4, = 1 type-IIB orientifolds. Some consistency conditions are found from the closed string and open string spectrum and from tadpole cancellation. Only real values of the discrete torsion parameter are allowed, i.e. = ±1. Orientifold models are related to real projective representations. In a similar way as complex projective representations are classified by H2(Γ,*) = H2(Γ,U(1)), real projective representations are characterized by H2… CONTINUE READING

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