We examine some general properties of a certain class of scalar field theory models containing nontopological soliton solutions in the context of brane world models with compact large extra dimensions. If a scalar field is allowed to propagate in extra space, then, in addition to the standard Kaluza-Klein type excitations, a whole new class of very massive soliton-type states can exist.

• Received 8 July 2002

DOI:https://doi.org/10.1103/PhysRevD.67.045012