R^2 Corrections and Non-perturbative Dualities of N=4 String ground states

Details R^2 Corrections and Non-perturbative Dualities of N=4 String ground states R^2 Corrections and Non-perturbative Dualities of N=4 String ground states

1997-08-11

arxiv.org/abs/hep-th/9708062v1

Nucl.Phys.B510:423-476,1998

Physics

High Energy Physics

High Energy Physics - Theory

Latex2e, 51 pages, 1 figure

Scientific paper

10.1016/S0550-3213(97)00635-4

We compute and analyse a variety of four-derivative gravitational terms in the effective action of six- and four-dimensional type II string ground states with N=4 supersymmetry. In six dimensions, we compute the relevant perturbative corrections for the type II string compactified on K3. In four dimensions we do analogous computations for several models with (4,0) and (2,2) supersymmetry. Such ground states are related by heterotic-type II duality or type II-type II U-duality. Perturbative computations in one member of a dual pair give a non-perturbative result in the other member. In particular, the exact CP-even R^2 coupling on the (2,2) side reproduces the tree-level term plus NS 5-brane instanton contributions on the (4,0) side. On the other hand, the exact CP-odd coupling yields the one-loop axionic interaction a.R\wedge R together with a similar instanton sum. In a subset of models, the expected breaking of the SL(2,Z)_S S-duality symmetry to a \Gamma(2)_S subgroup is observed on the non-perturbative thresholds. Moreover, we present a duality chain that provides evidence for the existence of heterotic N=4 models in which N=8 supersymmetry appears at strong coupling.

Affiliated with

Also associated with

No associations

Rating

R^2 Corrections and Non-perturbative Dualities of N=4 String ground states does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with R^2 Corrections and Non-perturbative Dualities of N=4 String ground states, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and R^2 Corrections and Non-perturbative Dualities of N=4 String ground states will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-633317