Codimension two compactifications and the cosmological constant problem

By I. Navarro. 2003

133 citations recorded by the source corpus.

We consider solutions of six-dimensional Einstein equations with two compact dimensions. It is shown that one can introduce 3-branes in this background in such a way that the effective four-dimensional cosmological constant is completely independent of the brane tensions. These tensions are completely arbitrary, without requiring any fine tuning. We must, however, fine tune bulk parameters in order to obtain a sufficiently small value for the observable cosmological constant. We comment on the effective four-dimensional description of this effect at energies below the compactification scale.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/0c87001321ec0651ec4365836c38c1535d9db352