Talk abstract details

It is shown that the cosmological constant problem in brane-world is different from the same problem in general relativity, because the gauge fields contributing to the vacuum energy are confined to the brane-world, but the gravitational field, including the cosmological term propagates in the bulk. This implies in the emergence of a second order, conserved symmetric tensor field in four dimensions defined by the extrinsic curvature, which adjusts the vacuum energy. In the particular case of the FRW brane-world universe in the five-dimensional deSitter bulk this appears as an effective time varying cosmological term, with a remarkable agreement with the current gold set of cosmological data.