Realistic Yukawa Structures from Orientifold Compactifications

Details Realistic Yukawa Structures from Orientifold Compactifications Realistic Yukawa Structures from Orientifold Compactifications

2009-05-20

arxiv.org/abs/0905.3379v2

JHEP 0912:063,2009

Physics

High Energy Physics

High Energy Physics - Theory

42 pages, 3 figures. v2: R-parity constraints and Yukawa texture analysis improved; typos corrected and references added

Scientific paper

10.1088/1126-6708/2009/12/063

We perform a systematic analysis of globally consistent D-brane quivers which realize the MSSM, and analyze them with respect to their Yukawa couplings. Often, desired couplings are perturbatively forbidden due to the presence of global U(1) symmetries. We investigate the conditions under which D-brane instantons will induce these missing couplings without generating other phenomenological drawbacks, such as R-parity violating couplings or a mu-term which is too large. Furthermore, we systematically analyze which quivers allow for a mechanism that can account for the small neutrino masses and other experimentally observed hierarchies. We show that only a small fraction of the globally consistent D-brane quivers exhibits phenomenology compatible with experimental observations.

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