A relativistic 3-brane can be given a conformally invariant, gauge-type, formulation provided the embedding space is six-dimensional. The implementation of conformal invariance requires the use of a modified measure, independent of the metric in the action. A brane-world scenario without the need of a cosmological constant in 6D can be constructed. Thus, no "old" cosmological constant problem appears at this level.
|Title of host publication||The Tenth Marcel Grossmann Meeting|
|Subtitle of host publication||On Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories|
|Publisher||World Scientific Publishing Co.|
|Number of pages||4|
|State||Published - 1 Jan 2006|