Exotic branes and mixed-symmetry potentials. I. Predictions from E11 symmetry.

Type II string theory or M-theory contains a broad spectrum of gauge potentials. In addition to the standard |$p$| -form potentials, various mixed-symmetry potentials have been predicted, which may couple to exotic branes with non-standard tensions. Together with |$p$| -forms, mixed-symmetry potentials turn out to be essential to build the multiplets of the |$U$| -duality symmetry in each dimension. In this paper, we systematically determine the set of mixed-symmetry potentials and exotic branes on the basis of the |$E_{11}$| conjecture. We also study the decompositions of |$U$| -duality multiplets into |$T$| -duality multiplets and determine which mixed-symmetry tensors are contained in each of the |$U$| -/ |$T$| -duality multiplets. [ABSTRACT FROM AUTHOR]