Realistic Yukawa Textures and SUSY Spectra from Intersecting Branes

Abstract

We study the possible phenomenology of a three-family Pati-Salam model constructed from intersecting D6-branes in Type IIA string theory on the T^6/(Z2 x Z2) orientifold with some desirable semi-realistic features. In the model, tree-level gauge coupling unification is achieved automatically at the string scale, and the gauge symmetry may be broken to the Standard Model (SM) close to the string scale. The small number of extra chiral exotic states in the model may be decoupled via the Higgs mechanism and strong dynamics. We calculate the possible supersymmetry breaking soft terms and the corresponding low-energy supersymmetric particle spectra which may potentially be tested at the Large Hadron Collider (LHC). We find that for the viable regions of the parameter space the lightest CP-even Higgs boson mass usually satisfies m_H < 120 GeV, and the observed dark matter density may be generated. Finally, we find that it is possible to obtain correct SM quark masses and mixings, and the tau lepton mass at the unification scale. Additionally, neutrino masses and mixings may be generated via the seesaw mechanism. Mechanisms to stabilize the open and closed-string moduli, which are necessary for the model to be truly viable and to make definite predictions are discussed.

48 pages, 13 eps figures. Better organization and discussion of the Yukawa couplings. Added section on moduli stabilization. Accepted for publication in Physical Review D

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• Four-dimensional String Compactifications with D-Branes, Orientifolds and Fluxes
• Spacetime Instanton Corrections in 4D String Vacua - The Seesaw Mechanism for D-Brane Models
• Neutrino Majorana Masses from String Theory Instanton Effects
• Instanton Induced Neutrino Majorana Masses in CFT Orientifolds with MSSM-like spectra
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• Type IIA Pati-Salam Flux Vacua
• Flipped and Unflipped SU(5) as Type IIA Flux Vacua
• MSSM via Pati-Salam from Intersecting Branes on $T^6/({\mathbb{Z}}_2\times {\mathbb{Z}}_2^{\prime })$

Cited by in corpus (8)

• Towards Realistic String Vacua From Branes At Singularities
• Light Higgses at the Tevatron and at the LHC and Observable Dark Matter in SUGRA and D Branes
• Stringy Instantons and Yukawa Couplings in MSSM-like Orientifold Models
• Yukawa Corrections from Four-Point Functions in Intersecting D6-Brane Models
• Two-Point Functions of Chiral Fields at One Loop in Type II
• Stringy WIMP Detection and Annihilation
• Realistic Four-Generation MSSM in Type II String Theory
• The No-Scale Multiverse at the LHC