Probing a Very NarrowZ′Boson with CDF and D0 Data

The CDF and D0 data of nearly $475{\mathrm{pb}}^{-1}$ in the dilepton channel is used to probe a recent class of models, Stueckelberg extensions of the standard model (StSM), which predict a $Z^{\prime }$ boson whose mass is of topological origin with a very narrow decay width. A Drell-Yan analysis for dilepton production via this $Z^{\prime }$ shows that the current data put constraints on the parameter space of the StSM. With a total integrated luminosity of $8{\mathrm{fb}}^{-1}$, the very narrow $Z^{\prime }$ can be discovered up to a mass of about 600 GeV. The StSM $Z^{\prime }$ will be very distinct since it can occur in the region where a Randall-Sundrum graviton is excluded.