AdS_3 backgrounds from 10D effective action of heterotic string theory (CROSBI ID 158159)
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Podaci o odgovornosti
Dominis Prester, Predrag
engleski
AdS_3 backgrounds from 10D effective action of heterotic string theory
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.
string theory; effective actions; AdS/CFT; exact AdS_3 solutions
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Podaci o izdanju
81 (4)
2010.
044014-1-044014-14
objavljeno
1550-7998
10.1103/PhysRevD.81.044014