Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-06-14
JHEP0509:061,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 Pages and 8 PostScript Figures
Scientific paper
10.1088/1126-6708/2005/09/061
We analyze the gauge unification in minimal supersymmetric SO(10) grand unified theories in 5 dimensions. The single extra spatial dimension is compactified on the orbifold S^1/(Z_2 x Z_2') reducing the gauge group to that of Pati-Salam SU(4)_c x SU(2)_L x SU(2)_R. The Standard Model gauge group is achieved by the further brane-localized Higgs mechanism on one of the fixed points. There are two main different approaches developed in literature. Higgs mechanism can take place on the Pati Salam brane, or on the SO(10) preserving brane. We show, both analytically and numerically, that in the first case a natural and succesfull gauge coupling unification can be achieved, while the second case is highly disfavoured. For completeness, we consider either the case in which the brane breaking scale is near the cutoff scale or the case in which it is lower than the compactification scale.
Alciati Maria Laura
Lin Yin
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