AdS_3 backgrounds from 10D effective action of heterotic string theory
Abstract
We present a method for calculating solutions and corresponding central charges for backgrounds with AdS_3 and S^k factors in alpha'-exact fashion from the full tree-level low energy effective action of heterotic string theory. Three examples are explicitly presented: AdS_3 X S^3 X T^4, AdS_3 X S^2 X S^1 X T^4 and AdS_3 X S^3 X S^3 X S^1. Crucial property which enabled our analysis is vanishing of the Riemann tensor calculated from connection with "sigma-model torsion". We show the following: (i) Chern-Simons terms are the only source of alpha'-corrections not only in BPS, but also in non-BPS cases, suggesting a possible extension of general method of Kraus and Larsen, (ii) our results are in agreement with some conjectures on the form of the part of tree-level Lagrangian not connected to mixed Cern-Simons term by supersymmetry (and present in all supersymmetric string theories), (iii) new alpha'-exact result for central charges in AdS_3 X S^3 X S^3 X S^1 geometry. As a tool we used our generalization of Sen's entropy function formalism to AdS_p with p>2, and paid special attention to proper definition of asymptotic charges.
Keywords
Cite
@article{arxiv.0912.0030,
title = {AdS_3 backgrounds from 10D effective action of heterotic string theory},
author = {Predrag Dominis Prester},
journal= {arXiv preprint arXiv:0912.0030},
year = {2010}
}
Comments
21 pages; v2: misprints corrected, references added ; v3: added important discussion on definition of charges, additional minor improvements, more references added