Three-Family Supersymmetric Standardlike Models from Intersecting Brane Worlds

We construct the first three family $N=1\mathrm{}$ supersymmetric string model with standard model gauge group $\mathrm{SU}(3{)}_C\times \mathrm{SU}(2{)}_L\times \mathrm{U}(1{)}_Y$ from an orientifold of type IIA theory on ${\mathbf{T}}^6/({\mathbf{Z}}_2\times {\mathbf{Z}}_2)$ and D6-branes intersecting at angles. In addition to the minimal supersymmetric standard model particles, the model contains right-handed neutrinos, a chiral (but anomaly-free) set of exotic multiplets, and extra vectorlike multiplets. We discuss some phenomenological features of this model.