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Employing new scanning methods, we revisit the systematic construction of three-family $N=1$ supersymmetric Pati-Salam models in Type IIA orientifolds on ${\bf T}^6/(\mathbb Z_2\times \mathbb Z_2)$ with intersecting D6-branes. Arising from…

High Energy Physics - Theory · Physics 2020-06-23 Tianjun Li , Adeel Mansha , Rui Sun

Following the scanning methods of arXiv:1910.04530, we for the first time systematically construct the $N=1$ supersymmetric $SU(12)_C\times SU(2)_L\times SU(2)_R$ models, $SU(4)_C\times SU(6)_L\times SU(2)_R$ models, and $SU(4)_C\times…

High Energy Physics - Theory · Physics 2023-04-28 Tianjun Li , Adeel Mansha , Rui Sun

We provide a systematic construction of three-family N=1 supersymmetric Pati-Salam models from Type IIA orientifolds on $\IT^6/(\IZ_2\times \IZ_2)$ with intersecting D6-branes. All the gauge symmetry factors $SU(4)_C\times SU(2)_L \times…

High Energy Physics - Theory · Physics 2009-09-17 Mirjam Cvetic , Tianjun Li , Tao Liu

We discuss the construction of chiral four dimensional ${\bf T^6/(Z_3 \times Z_3)}$ orientifold compactifications of IIA theory, using D6-branes intersecting at angles and not aligned with the orientifold O6 planes. Cancellation of mixed…

High Energy Physics - Theory · Physics 2011-07-19 Christos Kokorelis

We show that for supersymmetric AdS vacua on Type IIA orientifolds with flux compactifications, the RR tadpole cancellation conditions can be completely relaxed, and then the four-dimensional N=1 supersymmetry conditions are the main…

High Energy Physics - Theory · Physics 2008-11-26 Ching-Ming Chen , Tianjun Li , Dimitri V. Nanopoulos

We provide a general overview of the current state of the art in four dimensional three generation model building proposals - using intersecting D-brane toroidal compactifications [without fluxes] of IIA, IIB string theories - which have…

High Energy Physics - Theory · Physics 2007-05-23 Christos Kokorelis

We construct a systematic method to build all the possible three-family ${\cal N}=1$ supersymmetric Pati-Salam models from Type IIA orientifolds on $\mathbb{T}^6/(\mathbb{Z}_2\times \mathbb{Z}_2)$ with intersecting D6-branes, in which the…

High Energy Physics - Theory · Physics 2022-08-09 Weikun He , Tianjun Li , Rui Sun

Intersecting D-brane model building often suffer from the unstabilized open-string moduli, leading to the unwanted massless adjoint scalars. In our previous work arXiv:2505.03664, this issue was resolved by employing the rigid D6-branes on…

High Energy Physics - Theory · Physics 2026-05-13 Adeel Mansha , Mudassar Sabir , Tianjun Li , Luyang Wang

We construct, for the first time, a three-family $\mathcal{N}=1$ supersymmetric Pati-Salam model from rigid intersecting D6-branes on a factorizable $\mathbb{T}^6/(\mathbb{Z}_2\times \mathbb{Z}_2')$ orientifold with discrete torsion. The…

High Energy Physics - Theory · Physics 2025-07-01 Adeel Mansha , Mudassar Sabir , Tianjun Li , Luyang Wang

We construct new semi-realistic Type IIB flux vacua on $Z_2\times Z_2$ orientifolds with three- and four- Standard Model (SM) families and up to three units of quantized flux. The open-string sector is comprised of magnetized D-branes and…

High Energy Physics - Theory · Physics 2008-11-26 Mirjam Cvetic , Tianjun Li , Tao Liu

We construct new three-family ${\cal N}=1$ supersymmetric Pati-Salam models from intersecting D6-branes with original gauge group ${\rm U}(4)_C \times {\rm USp}(2)_L \times {\rm U}(2)_R$ on a Type IIA $\mathbb{T}^6/(\mathbb{Z}_2\times…

High Energy Physics - Theory · Physics 2024-04-01 Adeel Mansha , Tianjun Li , Mudassar Sabir , Lina Wu

All the possible three-family ${\cal N}=1$ supersymmetric Pati-Salam models constructed with intersecting D6-branes from Type IIA orientifolds on $T^6/(\mathbb{Z}_2\times \mathbb{Z}_2)$ are recently presented in arXiv: 2112.09632. Taking…

High Energy Physics - Theory · Physics 2022-08-17 Weikun He , Tianjun Li , Rui Sun , Lina Wu

We explore supersymmetric Type I string-motivated three-family scenarios in which the Standard Model is embedded within two sets of intersecting D branes with U(1)-extended Pati-Salam gauge groups. We study a model inspired by the Shiu-Tye…

High Energy Physics - Phenomenology · Physics 2009-11-07 L. Everett , G. L. Kane , S. F. King , S. Rigolin , L. Wang

We construct an MSSM-like model via Pati-Salam from intersecting D-branes in Type IIA theory on the $\Z_2 \times \Z_2'$ orientifold where the D-branes wrap rigid 3-cycles. Because the 3-cycles are rigid, there are no extra massless fields…

High Energy Physics - Theory · Physics 2008-11-26 Ching-Ming Chen , V. E. Mayes , D. V. Nanopoulos

Generalizing three-family chiral fermion conditions to $I_{ac}=-(3+h)$ and $I_{ac'}=h$, with positive integer $h$, we extend the landscape of three-family ${\cal N}=1$ supersymmetric Pati-Salam models in a broader region. Differing from the…

High Energy Physics - Theory · Physics 2025-12-19 Tianjun Li , Qi Sun , Rui Sun , Lina Wu

We revisit the construction of the $\mathcal{N}=1$ supersymmetric trinification models with gauge group $\mathrm{U}(3)_C\times \mathrm{U}(3)_L \times \mathrm{U}(3)_R$ in Type IIA string theory on $\mathbf{T^6/(\mathbb{Z}_2\times…

High Energy Physics - Theory · Physics 2024-07-22 Adeel Mansha , Tianjun Li , Mudassar Sabir

We investigate the construction of four-family ${\cal N}=1$ supersymmetric Pati-Salam models from Type IIA $\mathbb{T}^6/(\mathbb{Z}_2 \times \mathbb{Z}_2)$ orientifold with intersecting D6-branes. Utilizing the deterministic algorithm…

High Energy Physics - Theory · Physics 2022-07-06 Tianjun Li , Rui Sun , Chi Zhang

By introducing an extra stack of D6-branes to standard ${\cal N}=1$ supersymmetric Pati-Salam models, we extend the landscape of its complete search. In this construction, the $d$-stack of D6-branes is introduced besides the standard…

High Energy Physics - Theory · Physics 2026-01-09 Haotian Huangfu , Tianjun Li , Qi Sun , Rui Sun

We study supersymmetric intersecting D6-branes wrapping 3-cycles in the Type IIA T^6/Z_4 orientifold background. As a new feature, the 3-cycles in this orbifold space arise both from the untwisted and the Z_2 twisted sectors. We present an…

High Energy Physics - Theory · Physics 2009-11-07 Ralph Blumenhagen , Lars Goerlich , Tassilo Ott

It is well-known that three-family supersymmetric Pati-Salam models from intersecting D6-branes, where either one or both of the ${\rm U}(2)$ gauge factors are replaced by a ${\rm USp}(2)$ group, are quite scarce. In order to construct all…

High Energy Physics - Theory · Physics 2023-11-23 Adeel Mansha , Tianjun Li , Lina Wu
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