Discerning secluded sector gauge structures

Abstract

New fundamental particles, charged under new gauge groups and only weakly\ncoupled to the standard sector, could exist at fairly low energy scales. In\nthis article we study a selection of such models, where the secluded group\neither contains a softly broken U(1) or an unbroken SU(N). In the Abelian case\nnew {\\gamma}v gauge bosons can be radiated off and decay back into visible\nparticles. In the non-Abelian case there will not only be a cascade in the\nhidden sector, but also hadronization into new {\\pi}v and {\\rho}v mesons that\ncan decay back. This framework is developed to be applicable both for e+e- and\npp collisions, but for these first studies we concentrate on the former process\ntype. For each Abelian and non-Abelian group we study three different scenarios\nfor the communication between the standard sector and the secluded one. We\nillustrate how to distinguish the various characteristics of the models and\nespecially study to what extent the underlying gauge structure can be\ndetermined experimentally.\n