Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2000-11-19
Class.Quant.Grav. 18 (2001) 3233-3240
Physics
High Energy Physics
High Energy Physics - Theory
Minor corrections. Talk given at the Second Gursey Memorial Conference, Istanbul
Scientific paper
10.1088/0264-9381/18/16/313
The proposal that a strong coupling limit of the five-dimensional type II string theory (M-theory compactified on a 6-torus) in which the Planck length becomes infinite could give a six-dimensional superconformal phase of M-theory is reviewed. This limit exists for the free theory, giving a 6-dimensional theory with (4,0) supersymmetry compactified on a circle whose radius gives the 5-dimensional Planck length. The free 6-dimensional theory has a fourth rank tensor gauge field with the symmetries of the Riemann tensor instead of a symmetric tensor gauge field, but its dimensional reduction gives conventional linearised gravity in five dimensions. The possibility of an interacting form of this theory existing and the consequences it would have for the geometric picture of gravity are discussed.
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