Towards a hybrid compactification with a scalar-tensor global cosmic string
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Iop Publishing Ltd
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Resumo
We derive a solution of the gravitational equations which leads to a braneworld scenario in six dimensions, using a global cosmic string solution in a low energy effective string theory framework. The final spacetime is composed by one warped brane with R((3,1)) x S(1) topology and a power law warp factor, and one non-compact extra dimension transverse to the brane; by looking at the current experimental bounds, we find a range of parameters in which, if the on-brane dimension has an acceptable size, it does not solve the hierarchy problem. In another example, this problem is smoothed by means of the Brans-Dicke parameter.
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string theory and cosmology, cosmological applications of theories with extra dimensions, cosmic strings, domain walls, monopoles
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Inglês
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Journal of Cosmology and Astroparticle Physics. Bristol: Iop Publishing Ltd, n. 9, p. 12, 2008.
