D-Brane superpotentials in Calabi-Yau orientifolds
D-Brane superpotentials in Calabi-Yau orientifolds
We develop computational tools for the tree-level superpotential of B-branes in Calabi-Yau orientifolds.Our method is based on a systematic implementation of the orientifold projection in the geometric approach of Aspinwall and Katz.In the process, we lay down some ground rules for orientifold projections in the derived category.