D=4, N=1, type IIA orientifolds
Abstract
We study a D=4, N=1, type IIA orientifold with an orbifold group Z_{N} and Z_{N}×Z_{M}. We calculate the oneloop vacuum amplitudes for the Klein bottle, cylinder, and Möbius strip and extract the tadpole divergences. We find that the tadpole cancellation conditions thus obtained are satisfied by the Z_{4}, Z_{8}, Z'_{8}, Z'_{12} orientifolds while there is no solution for Z_{3}, Z_{7}, Z_{6}, Z'_{6}, Z_{12}. The Z_{4}×Z_{4} type IIA orientifold is also constructed by introducing four different configurations of 6branes. We argue about perturbative versus nonperturbative orientifold vacua under T duality between the type IIA and the type IIB Z_{N} orientifolds in four dimensions.
 Publication:

Physical Review D
 Pub Date:
 December 1999
 DOI:
 10.1103/PhysRevD.60.126005
 arXiv:
 arXiv:hepth/9908017
 Bibcode:
 1999PhRvD..60l6005I
 Keywords:

 11.25.Mj;
 Compactification and fourdimensional models;
 High Energy Physics  Theory
 EPrint:
 32 pages, LaTeX