D-branes, moduli, and supersymmetry
- Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States)
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
We study toroidal compactifications of type II string theory with D-branes and nontrivial antisymmetric tensor moduli and show that turning on these fields modifies the supersymmetry projections imposed by D-branes. These modifications are seen to be necessary for the consistency of T duality. We also show the existence of unusual BPS configurations of branes at angles that are supersymmetric because of conspiracies between moduli fields. Analysis of the problem from the point of view of the effective field theory of massless modes shows that the presence of a two-form background must modify the realization of supersymmetry on the brane. In particular, the appropriate supersymmetry variation of the physical gaugino vanishes in any constant field strength background. These considerations are relevant for the E{sub 7(7)}-symmetric counting of states of four-dimensional black holes in type II string theory compactified on T{sup 6}. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Princeton Univ., NJ (United States)
- DOE Contract Number:
- FG02-91ER40671; FG05-90ER40559
- OSTI ID:
- 503762
- Journal Information:
- Physical Review, D, Vol. 55, Issue 10; Other Information: PBD: May 1997
- Country of Publication:
- United States
- Language:
- English
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