Tadpole Cancellation in Unoriented Liouville Theory

Abstract

The tadpole cancellation in the unoriented Liouville theory is discussed. Using two different methods -- the free field method and the boundary-crosscap state method, we derive one-loop divergences. Both methods require two D1-branes with the symplectic gauge group to cancel the orientifold tadpole divergence. However, the finite part left is different in each method and this difference is studied. We also discuss the validity of the free field method and the possible applications of our result.

12 pages; v2: sign error in the crosscap state is corrected, some related argumets are modified and clarified; v3: minor corrections; v4:reference added

References in corpus (2)

• A Matrix Model Dual of Type 0B String Theory in Two Dimensions
• D-brane Decay in Two-Dimensional String Theory

Cited by in corpus (7)

• Flux Backgrounds in 2D String Theory
• Two-Dimensional Unoriented Strings And Matrix Models
• The Cap in the Hat: Unoriented 2D Strings and Matrix(-Vector) Models
• Tree-Level Stability Without Spacetime Fermions: Novel Examples in String Theory
• The Liouville Geometry of N=2 Instantons and the Moduli of Punctured Spheres
• Crosscap states in N=2 Liouville theory
• Orientifolds in N=2 Liouville Theory and its Mirror