Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-11-29
Phys. Lett. B478:307-312, 2000
Physics
High Energy Physics
High Energy Physics - Theory
9 pages, Latex, minor change and add references
Scientific paper
10.1016/S0370-2693(00)00302-6
We construct the general model with only parallel positive tension 3-branes on $M^4 \times R^1$ and $M^4 \times R^1/Z_2$. The cosmology constant is sectional constant along the fifth dimension. In this general scenario, the 5-dimensional GUT scale on each brane can be indentified as the 5-dimensional Planck scale, but, the 4-dimensional Planck scale is generated from the low 4-dimensional GUT scale exponentially in our world. We also give two simple models to show explicitly how to solve the gauge hierarchy problem.
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