Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-04-27
Nucl.Phys. B583 (2000) 237-259
Physics
High Energy Physics
High Energy Physics - Theory
37 Pages, Tex, Phyzzx Macro. Minor changes
Scientific paper
10.1016/S0550-3213(00)00323-0
A strong coupling limit of theories whose low-energy effective field theory is 5-dimensional N=8 supergravity is proposed in which the gravitational coupling becomes large. It is argued that, if this limit exists, it should be a 6-dimensional theory with (4,0) supersymmetry compactified on a circle whose radius gives the 5-dimensional Planck length. The sector corresponding to the D=5 supergravity multiplet is a (4,0) D=6 superconformal field theory based on the (4,0) multiplet with 27 self-dual 2-forms, 42 scalars and, instead of a graviton, a fourth-rank tensor gauge field satisfying a self-duality constraint. The superconformal field theory has 32 supersymmetries and 32 conformal supersymmetries and its dimensional reduction gives the maximal supergravity in five dimensions. Electromagnetic duality generalises to a gravitational triality.
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