37 citations · 135 across the 8 of their papers we have counts for
8 papers
Heterotic E6 GUTs and Partition Functions
Motoharu Ito, Shogo Kuwakino, Nobuhiro Maekawa +5
The E6 grand unified theory is an attractive candidate intermediate theory between the standard model and string theory. However, only one E6 grand unified model with three generat…
E6 grand unified theory with three generations from heterotic string
Motoharu Ito, Shogo Kuwakino, Nobuhiro Maekawa +5
We construct two more supersymmetric E6 grand unified models with three generations within the framework of Z12 asymmetric orbifold compactification of the heterotic string theory.…
Massive Superstring Scatterings in the Regge Regime
Song He, Jen-Chi Lee, Keijiro Takahashi +1
We calculate four classes of high energy massive string scattering amplitudes of fermionic string theory at arbitrary mass levels in the Regge regime (RR). We show that all four le…
Type IIA orientifolds and orbifolds on non-factorizable tori
Tetsuji Kimura, Mitsuhisa Ohta, Kei-Jiro Takahashi
We investigate Type II orientifolds on non-factorizable torus with and without its oribifolding. We explicitly calculate the Ramond-Ramond tadpole from string one-loop amplitudes,…
Three-Family Models from a Heterotic Orbifold on the E_6 Root Lattice
Kei-Jiro Takahashi
We classify N=1 orbifolds on the E_6 root lattice and investigate explicit model constructions on the Z_3xZ_3 orbifold in heterotic string theory. Interestingly some of the twisted…
Heterotic orbifold models on Lie lattice with discrete torsion
Kei-Jiro Takahashi
We provide a new class of Z_N x Z_M heterotic orbifolds on non-factorisable tori, whose boundary conditions are defined by Lie lattices. Generally, point groups of these orbifolds…