|
Lisa Carloni, Johan Rathsman, Torbjorn Sjostrand
Discerning Secluded Sector gauge structures
Abstract
New fundamental particles, charged under new gauge groups and only weakly
coupled to the standard sector, could exist at fairly low energy scales.
In this article we study a selection of such models, where the secluded
group either contains a softly broken U(1) or an unbroken SU(N). In the
Abelian case new {\gamma}v gauge bosons can be radiated off and decay back
into visible particles. In the non-Abelian case there will not only be a
cascade in the hidden sector, but also hadronization into new {\pi}v and
{\rho}v mesons that can decay back. This framework is developed to be
applicable both for e+e- and pp collisions, but for these first studies we
concentrate on the former process type. For each Abelian and non-Abelian
group we study three different scenarios for the communication between the
standard sector and the secluded one. We illustrate how to distinguish the
various characteristics of the models and especially study to what extent
the underlying gauge structure can be determined experimentally.
LU TP 11-09
|
