Curvature squared terms and string theories
Abstract
The compatibility between the presence of curvature squared terms and the absence of ghost particles in the low energy limits of string theories is established. The lagrangian ʃ√g dD×(R μνϱσR μνϱσ-4R μνR μν+R 2) leads to ghost-free nontrivial gravitational self-interactions for dimensions higher than four.
- Publication:
-
Physics Letters B
- Pub Date:
- June 1985
- DOI:
- 10.1016/0370-2693(85)91616-8
- Bibcode:
- 1985PhLB..156..315Z