A note on orientifolds and Ftheory
Abstract
An orientifold of TypeIIB theory on a K3 realized as a Z_{2} orbifold is constructed which corresponds to Ftheory compactification on a CalabiYau orbifold with Hodge numbers (51,3). The Tdual of this model is analogous to an orbifold with discrete torsion in that the action of orientation reversal has an additional phase on the twisted sectors, and both 9branes and 5branes carry orthogonal gauge groups. An orientifold of the Z_{3} orbifold and its relation to Ftheory is briefly discussed.
 Publication:

Physics Letters B
 Pub Date:
 February 1997
 DOI:
 10.1016/S03702693(97)000129
 arXiv:
 arXiv:hepth/9607041
 Bibcode:
 1997PhLB..394..302D
 Keywords:

 High Energy Physics  Theory
 EPrint:
 11 pages, harvmac