R--R Scalars, U--Duality and Solvable Lie Algebras

Abstract

We consider the group theoretical properties of R--R scalars of string theories in the low-energy supergravity limit and relate them to the solvable Lie subalgebra $\IG_s\subset U$ of the U--duality algebra that generates the scalar manifold of the theory: $\exp[\IG_s]= U/H$. Peccei-Quinn symmetries are naturally related with the maximal abelian ideal ${\cal A} \subset \IG_s $ of the solvable Lie algebra. The solvable algebras of maximal rank occurring in maximal supergravities in diverse dimensions are described in some detail. A particular example of a solvable Lie algebra is a rank one, $2(h_{2,1}+2)$--dimensional algebra displayed by the classical quaternionic spaces that are obtained via c-map from the special Kählerian moduli spaces of Calabi-Yau threefolds.

17 pages, misprints in Table 2 corrected

References in corpus (3)

• Five Dimensional SUSY Field Theories, Non-trivial Fixed Points and String Dynamics
• Extremal Transitions and Five-Dimensional Supersymmetric Field Theories
• Hypermultiplet Moduli Space and String Compactification to Three Dimensions

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