2001/01/31 by Ben Craps, Matthias R. Gaberdiel · 1 citation
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Homotopy and Cohomology in Algebraic Topology #Nonlinear Waves and Solitons #hep-th
paper · pdf · doi:10.1088/1126-6708/2001/04/013
published as JHEP 0104:013,2001 · 30 pages, harvmac b-mode; v2: added arguments in support of stability of non-BPS brane in section 4.2; v3: review subsection added to introduction, minor corrections
openalex publication_date 2001/04/09 · arxiv created 2001/04/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
The consistency of the orbifold action on open strings between D-branes in orbifold theories with and without discrete torsion is analysed carefully. For the example of the C3/Z2 x Z2 theory, it is found that the consistency of the orbifold action requires that the D-brane spectrum contains branes that give rise to a conventional representation of the orbifold group as well as branes for which the representation is projective. It is also shown how the results generalise to the orbifolds C3/ZN x ZN for which a number of novel features arise. In particular, the N>2 theories with minimal discrete torsion have non-BPS branes charged under twisted R-R potentials that couple to none of the (known) BPS branes.