F4 terms in N = 4 string vacua

9611205 F 4 Terms in N = 4 String Vacua †

Singularities in D = 4, N = 1 Heterotic String Vacua *

Perturbative d = 4, N = 1 heterotic vacua are characterized by a c = 9 conformal field theory (CFT) with (0, 2) worldsheet supersymmetry and the choice of a c̄ = 22 vector bundle. The space-time spectrum features the gravitational multiplet, non-Abelian vector multiplets, charged chiral matter multiplets Q , Q̂ and gauge neutral chiral moduli multiplets M . The couplings of these multiplets are d...

Singularities in D = 4, N = 1 Heterotic String Vacua *

Singularities in the Yukawa and gauge couplings of N = 1 compactifications of the SO(32) heterotic string are discussed. Perturbative d = 4, N = 1 heterotic vacua are characterized by a c = 9 conformal field theory (CFT) with (0, 2) worldsheet supersymmetry and the choice of a ¯ c = 22 vector bundle. The space-time spectrum features the gravitational multiplet, non-Abelian vector multiplets, ch...

Supersymmetric string vacua on AdS3 ×N

String backgrounds of the form AdS 3 × N that give rise to two dimensional spacetime superconformal symmetry are constructed. 1. Introduction In this letter we study the conditions on curved string backgrounds of the form AdS 3 × N that give rise to spacetime superconformal symmetry. We use the NSR formulation; for simplicity we describe the left moving sector only – it can be combined with the...

de Sitter String Vacua from Supersymmetric D - terms

We propose a new mechanism for obtaining de Sitter vacua in type IIB string theory compactified on (orientifolded) Calabi-Yau manifolds similar to those recently studied by Kachru, Kallosh, Linde and Trivedi (KKLT). dS vacuum appears in KKLT model after uplifting an AdS vacuum by adding an anti-D3-brane, which explicitly breaks supersymmetry. We accomplish the same goal by adding fluxes of gaug...