Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-11-30
Phys.Lett. B502 (2001) 209-215
Physics
High Energy Physics
High Energy Physics - Theory
10 pages, LaTeX file, version to appear in Phys.Lett.B
Scientific paper
10.1016/S0370-2693(01)00150-2
Type IIB superstring models with the standard model gauge group on D3-branes and with massless matter associated with open strings joining D3-branes to D3-branes or D3-branes to ${\rm D}7_3$-branes are studied. Models with gauge coupling constant unification at an intermediate scale between about $10^{10}$ and $10^{12}$GeV and consistency with the observed value of $\sin^2 \theta_W (M_Z)$ are obtained. Extra vector-like states and extra pairs of Higgs doublets play a crucial role.
Bailin David
Kraniotis G. V.
Love Alex
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