Type-IIB orientifolds on Gepner points

ALDAZABAL, GERARDO; ANDRÉS, EDUARDO C; LESTON, MAURICIO; NÚÑEZ, CARMEN

JOURNAL OF HIGH ENERGY PHYSICS - (Online)

IOP

Año: 2003 vol. 2003 p. 67 - 67

1029-8479

We study various aspects of orientifold projections of Type IIB closedstringtheory on Gepner points in different dimensions.The open string sector is introduced, in the usual constructive way, inorder tocancel RR charges carried by orientifold planes.Moddings by cyclic permutations of the internal $N=2$ superconformalblocks as well as by discrete phase symmetries are implemented. Reductionin the number of generations, breaking or enhancements of gauge symmetriesand topology changes are shown to be induced by such moddings.Antibranes sector is also considered;in particular we show how non supersymmetric models with antibranes andfree of closed and open tachyons do appear in this context.A systematic study of consistent modelsin $D=8$ dimensions and some illustrative examples in $D=6$ and $D=4$dimensions are presented.