Tadpole cancellation in the topological string

by Johannes Walcher (Princeton IAS)

Tuesday 5 Feb 2008, 14:00 → 15:00 Europe/Zurich

TH Theory Conference Room (CERN)

We continue the extension of the holomorphic anomaly equation to the open string sector to also include unoriented strings. In the process, we obtain further evidence for the existence of a tadpole cancellation condition in the topological string. In the physically most satisfying situation, tadpoles are canceled by the inclusion of orientifold planes.