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Realistic Yukawa structures from orientifold compactifications

Mirjam Cvetič, James Halverson and Robert Richter

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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 μ-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.

Keywords

Superstring Vacua

Intersecting branes models

 

E-print Number: 0905.3379

Cited: by |

Refers: to

PACS

11.25.Uv D branes

11.30.Er Charge conjugation, parity, time reversal, and other discrete symmetries

14.60.Pq Neutrino mass and mixing

11.30.Pb Supersymmetry

11.25.Mj Compactification and four-dimensional models

12.60.Jv Supersymmetric models

Subjects

Particle physics and field theory

Dates

Issue 12 (December 2009)

Received 15 October 2009, accepted for publication 19 November 2009

Published 22 December 2009



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