Effective Action of Matter Fields in Four-Dimensional String Orientifolds
نویسندگان
چکیده
We study various aspects of the Kähler 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 moduli 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.
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تاریخ انتشار 2000