Nonperturbative Yukawa Couplings from String Instantons

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Physical Sciences and Mathematics
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Blumenhagen, Ralph
Lüst, Dieter
Richter, Robert
Weigand, Timo
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Nonperturbative D-brane instantons can generate perturbatively absent though phenomenologically relevant couplings for type II orientifold compactifications with D-branes. We discuss the generation of the perturbatively vanishing SU(5) GUT Yukawa coupling of type (10 10 5H). Moreover, for a simple globally consistent intersecting D6-brane model, we discuss the generation of mass terms for matter fields. This can serve as a mechanism for decoupling exotic matter.

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2008-02-15
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Suggested Citation: R. Blumenhagen, M. Cvetič, D. Lüst, R. Richter and T. Weigand. (2008). "Nonperturbative Yukawa Couplings from String Instantons." Physical Review Letters 100, 061602. © 2008 The American Physical Society http://dx.doi.org/10.1103/PhysRevLett.100.061602
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