Effective Action of Matter Fields in Four-Dimensional String Orientifolds
arXiv:hep-th/0003185 · doi:10.1088/1126-6708/2000/04/013
Abstract
We study various aspects of the Kahler metric for matter fields in N=1,2 orientifold compactifications of type IIB string theory. The result has an infrared-divergent part which reproduces the field- theoretical anomalous dimensions, and a moduli-dependent part which comes from N=2 sectors of the orientifold. For the N=2 orientifolds, we also compute the disk amplitude for two matter fields on the boundary and a twisted closed string modulus in the bulk. Our results are in agreement with supersymmetry: the singlet under the SU(2)_R R-symmetry has vanishing coupling, while the coupling of the SU(2)_R triplet does not vanish.
24 pages, JHEP LaTex, no figures, v2: references added, typos corrected