D-instanton and polyinstanton effects from type I' D0-brane loops
Artikel i vetenskaplig tidskrift, 2010

We study non-perturbative D(-1)-instanton corrections to quartic gauge and curvature couplings in 8d type IIB orientifolds, in terms of a one-loop computation of BPS D0-branes in T-dual type I' models. The complete perturbative and non-perturbative results are determined by the BPS multiplicities of perturbative open strings and D0-brane bound states in the 9d type I' theory. Its modular properties admit a geometric interpretation by lifting to Horava-Witten theory. We use the type I' viewpoint to motivate an interpretation of 8d and 4d polyinstanton effects, consistent with heterotic - type II orientifold duality.

threshold corrections

couplings

6 dimensions

d-brane instantons

string theory

dynamics

D-branes

String Duality

duality

compactifications

Nonperturbative Effects

n=2

orientifolds

Författare

Christoffer Petersson

Chalmers, Teknisk fysik, Matematisk fysik

P. Soler

Universidad Autonoma de Madrid (UAM)

A. M. Uranga

European Organization for Nuclear Research

Universidad Autonoma de Madrid (UAM)

Journal of High Energy Physics

1126-6708 (ISSN) 1029-8479 (eISSN)

6 089

Ämneskategorier

Fysik

DOI

10.1007/JHEP06(2010)089