Supersymmetric composite models on intersecting D-branes

Kitazawa, Noriaki

doi:10.1016/j.nuclphysb.2004.08.011

Cited by 7 publications

(8 citation statements)

References 20 publications

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“…The dynamics of the strongly coupled hidden sector leads to dynamical supersymmetry breaking with dilaton and untwisted complex structure moduli stabilization, as studied in detail in [95]. Charge confinement modifies the low energy spectrum by causing some exotics to disappear, while anomaly considerations imply that new composite states may emerge [93] (see also [96,97]).…”

Section: Generalizationsmentioning

confidence: 99%

Toward Realistic Intersecting D-Brane Models

Blumenhagen

Cvetič

Langacker

et al. 2005

Annu. Rev. Nucl. Part. Sci.

554

987

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We provide a pedagogical introduction to a recently studied class of phenomenologically interesting string models, known as Intersecting D-Brane Models. The gauge fields of the Standard-Model are localized on D-branes wrapping certain compact cycles on an underlying geometry, whose intersections can give rise to chiral fermions. We address the basic issues and also provide an overview of the recent activity in this field. This article is intended to serve non-experts with explanations of the fundamental aspects, and also to provide some orientation for both experts and nonexperts in this active field of string phenomenology. † Permanent address

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Section: Generalizationsmentioning

confidence: 99%

Toward Realistic Intersecting D-Brane Models

Blumenhagen

Cvetič

Langacker

et al. 2005

Annu. Rev. Nucl. Part. Sci.

554

987

View full text Add to dashboard Cite

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“…More general compactifications also change the situation [41]. Introduction of the compositeness may also change the situation [42,43,44].) The similar situation happens in the second type of models.…”

Section: Introductionmentioning

confidence: 80%

Dynamical Electroweak Symmetry Breaking in String Models With D-Branes

Kitazawa

2010

Int. J. Mod. Phys. A

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The possibility of dynamical electroweak symmetry breaking by strong coupling gauge interaction in models with D-branes in String Theory is examined. Instead of elementary scalar Higgs doublet fields, the gauge symmetry with strong coupling (technicolor) is introduced. As the first step of this direction, a toy model, which is not fully realistic, is concretely analyzed in some detail. The model consists of D-branes and anti-D-branes at orbifold singularities in (T 2 ×T 2 ×T 2 )/Z 3 which preserves supersymmetry. Supersymmetry is broken through the brane supersymmetry breaking. It is pointed out that the problem of large S parameter in dynamical electroweak symmetry breaking scenario may be solved by natural existence of kinetic term mixings between hypercharge U(1) gauge boson and massive anomalous U(1) gauge bosons. The problems to be solved toward constructing more realistic models are clarified in the analysis.

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“…When the family is replicated in the same torus, the Yukawa matrix turns out to be diagonal and no mixing arises when there is only one Higgs field. Several discussions exist describing this property [18,19,20].…”

Section: Yukawa Couplingsmentioning

confidence: 99%

“…As a result of the factorized form of Yukawa coupling, the Yukawa matrices are rank 1, and thus only the 3rd generation fermions are massive. In order to construct a realistic model, this issue for Yukawa matrices needs to be resolved and several possibilities have been considered in the literature [18,19,20].…”

Section: Introductionmentioning

confidence: 99%

Properties of fermion mixings in intersecting D-brane models

Dutta

Mimura

2006

Physics Letters B

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We consider the Yukawa couplings for quarks and leptons in the context of Pati-Salam model using intersecting D-brane models where the Yukawa coupling matrices are rank one in a simple choice of family replication. The CKM mixings can be explained by perturbing the rank 1 matrix using higher order terms involving new Higgs fields available in the model. We show that the near bi-large neutrino mixing angles can be naturally explained, choosing the light neutrino mass matrix to be type II seesaw dominant. The predicted value of U e3 is in the range ≃ 0.05 − 0.15. In the quark sector, V cb is naturally close to the strange/bottom quark mass ratio and we obtain an approximate relation V ub V cb ≃ (m s /m b ) 2 V us . The geometrical interpretations of the neutrino mixings are also discussed.

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Supersymmetric composite models on intersecting D-branes

Abstract: We construct supersymmetric composite models of quarks and leptons from type IIA T 6 /(Z 2 × Z 2 ) orientifolds with intersecting D6-branes. In case of T 6 = T 2 × T 2 × T 2 with no tilted

Cited by 7 publications

References 20 publications

Toward Realistic Intersecting D-Brane Models

Toward Realistic Intersecting D-Brane Models

Dynamical Electroweak Symmetry Breaking in String Models With D-Branes

Properties of fermion mixings in intersecting D-brane models

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