57 citations · 177 across the 6 of their papers we have counts for
6 papers
On Non-tachyonic Z_N x Z_M Orientifolds of Type 0B String Theory
K. Foerger
We study open descendants of four dimensional Z_N x Z_M orbifolds of the non-supersymmetric type 0B string theory. An exhaustive analysis shows, that using the crosscap constraint…
Higher Derivative Couplings and Heterotic-Type I Duality in Eight Dimensions
K. Foerger, S. Stieberger
We calculate F^4 and R^4T^(4g-4) couplings in d=8 heterotic and type I string vacua (with gauge and graviphoton field strengths F,T, and Riemann curvature R). The holomorphic piece…
String Amplitudes and N=2, d=4 Prepotential in Heterotic K3 x T^2 Compactifications
K. Foerger, S. Stieberger
For the gauge couplings, which arise after toroidal compactification of six-dimensional heterotic N=1 string theories from the T^2 torus, we calculate their one-loop corrections. T…
Simple Calculation of Instanton Corrections in Massive N=2 SU(3) SYM
Holger Ewen, Kristin Foerger
We give an explicit derivation of the Picard-Fuchs equations for N=2 supersymmetric SU(3) Yang-Mills theory with massive hypermultiplets in the fundamental representation.…
Prepotentials in N=2 Supersymmetric SU(3) YM-Theory with Massless Hypermultiplets
Holger Ewen, Kristin Foerger, Stefan Theisen
We explicitly determine the instanton corrections to the prepotential for N=2 supersymmetric SU(3) Yang-Mills theory with massless hypermultiplets in the weak coupling regions $u\t…
Higher-Derivative Gravity in String Theory
Kristin Forger, Burt A. Ovrut, Stefan J. Theisen +1
We explicitly extract the structure of higher-derivative curvature-squared terms at genus 0 and 1 in the d=4 heterotic string effective action compactified on symmetric orbifolds b…