Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-05-31
Nucl.Phys.B434:210-230,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
36 pages, KANAZAWA-94-09, Latex file
Scientific paper
10.1016/0550-3213(94)00465-Q
We examine whether a minimal string model possessing the same massless spectra as the MSSM can be obtained from $Z_4$, $Z_6$ and $Z_8$ orbifold constructions. Using an anomaly cancellation condition of the target space duality symmetry, we derive allowable values of a level $k_1$ of U(1)$_Y$ for the minimal string model on the orbifolds through computer analyses. We investigate threshold corrections of the gauge coupling constants of SU(3), SU(2) and U(1)$_Y$ and examine consistencies of the model with the LEP experiments. Further we investigate what kinds of hidden sectors are consistent with the minimal string models. Also their gauge coupling constants of the hidden groups are estimated. We discuss Yukawa couplings of the models.
Kawabe Hiroshi
Kobayashi Tatsuo
Ohtsubo Noriyasu
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