pith. machine review for the scientific record. sign in

arxiv: hep-th/9701093 · v3 · submitted 1997-01-20 · ✦ hep-th

Recognition: unknown

Effects of D-instantons

Michael B.Green (DAMTP , Cambridge , U.K.) , Michael Gutperle (DAMTP , U.K)
Authors on Pith no claims yet
classification ✦ hep-th
keywords theoryd-instantond-instantonseffectsscatteringstringsupergravitysuperstring
0
0 comments X
read the original abstract

Scattering of fundamental states of type IIB supergravity and superstring theory is discussed at low orders in perturbation theory in the background of a D-instanton. The integration over fermionic zero modes in both the low energy supergravity and in the string theory leads to explicit nonperturbative terms in the effective action. These include a single instanton correction to the known tree-level and one-loop $R^4$ interactions. The `spectrum' of multiply-charged D-instantons is deduced by T-duality in nine dimensions from multiply-wound world-lines of marginally-bound D-particles. This, and other clues, lead to a conjectured SL(2,Z) completion of the $R^4$ terms which suggests that they are not renormalized by perturbative corrections in the zero-instanton sector beyond one loop. The string theory unit-charged D-instanton gives rise to point-like effects in fixed-angle scattering, raising unresolved issues concerning distance scales in superstring theory.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Automorphic Structures of Heterotic Vacua

    hep-th 2026-05 unverdicted novelty 7.0

    Fixed points of Sp(4,Z) are extrema of the moduli potential in these heterotic models, with genus-2 no-go theorems for de Sitter vacua and possible metastable minima after SUSY breaking via nonperturbative Kähler terms.

  2. Symmetries of non-maximal supergravities with higher-derivative corrections

    hep-th 2026-03 unverdicted novelty 7.0

    Higher-derivative corrections explicitly break all hidden symmetry enhancements in the three-dimensional reductions of non-maximal supergravities.

  3. Wormholes and the imaginary distance bound

    hep-th 2026-05 unverdicted novelty 6.0

    Wormhole effects in theories with imaginary massless scalars set an upper limit on analytic continuation of couplings to imaginary values, with string theory examples showing the low-energy theory breaks down at or be...

  4. Fermionic modes of D-instanton wormholes from broken local supersymmetry

    hep-th 2026-04 unverdicted novelty 4.0

    Broken local supersymmetry modes in D-instanton wormholes deliver fermionic boundary modes through current-current two-point functions on tree-level cylinder geometry.