2005/09/30 by Ching-Ming Chen, Tianjun Li, Dimitri V. Nanopoulos
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Brane #Brane cosmology #Cosmology and Gravitation Theories #Gauge (firearms) #Gauge symmetry #Gauge theory #Geology #Geometry #Hidden sector #Higgs boson #Mathematical physics #Mathematics #Orientifold #Particle physics #Particle physics theoretical and experimental studies #Physics #Standard Model (mathematical formulation) #Supergravity #Supersymmetry #Symmetry (geometry) #Theoretical physics #Type (biology) #hep-ph #hep-th
paper · pdf · doi:10.1016/j.nuclphysb.2005.10.031
published as Nucl.Phys.B732:224-242,2006 · RevTex4, 27 pages, 9 tables, references added, version to appear in NPB
arxiv created 2005/11/01 · openalex publication_date 2005/11/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We construct new Standard-like models on Type II orientifolds. In Type IIA theory on T6/(\Z2× \Z2) orientifold with intersecting D6-branes, we first construct a three-family trinification model where the U(3)C× U(3)L× U(3)R gauge symmetry can be broken down to the SU(3)C× SU(2)L× U(1)YL× U(1)_I3R× U(1)YR gauge symmetry by the Green-Schwarz mechanism and D6-brane splittings, and further down to the SM gauge symmetry at the TeV scale by Higgs mechanism. We also construct a Pati-Salam model where we may explain three-family SM fermion masses and mixings. Furthermore, we construct for the first time a Pati-Salam like model with U(4)C × U(2)L × U(1)' × U(1)'' gauge symmetry where the U(1)_I3R comes from a linear combination of U(1) gauge symmetries. In Type IIB theory on T6/(\Z2× \Z2) orientifold with flux compactifications, we construct a new flux model with U(4)C × U(2)L × U(2)R gauge symmetry where the magnetized D9-branes with large negative D3-brane charges are introduced in the hidden sector. However, we can not construct the trinification model with supergravity fluxes because the three SU(3) groups already contribute very large RR charges. The phenomenological consequences of these models are briefly discussed as well.