Conformal Field Theory Couplings for Intersecting D-branes on Orientifolds

Abstract

We present a conformal field theory calculation of four-point and three-point correlation functions for the bosonic twist fields arising at the intersections of D-branes wrapping (supersymmetric) homology cycles of Type II orientifold compactifications. Both the quantum contribution from local excitations at the intersections and the world-sheet disk instanton corrections are computed. As a consequence we obtain the complete expression for the Yukawa couplings of chiral fermions with the Higgs fields. The four-point correlation functions in turn lead to the determination of the four-point couplings in the effective theory, and may be of phenomenological interest.

5 figures, 29 pages, equations 3 and 77 corrected, note added

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• More Supersymmetric Standard-like Models from Intersecting D6-branes on Type IIA Orientifolds
• New Standard-like Models from Intersecting D4-Branes
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