$Z^{\prime }$ search in non-minimal Universal Extra Dimensions: two bumps and interference

Abstract

We discuss prospects of the $Z^{\prime }$ search at the LHC in non-minimal Universal Extra Dimensions with tree-level brane-local terms in five dimensions. In this scenario, we find two major differences from the usual $Z^{\prime }$ physics: (i) two $Z^{\prime }$ candidates close-by in mass exist; (ii) the effective couplings to the SM fermions could be very large due to drastic overlapping of their profiles along the extra dimension. To evaluate the actual situation precisely, we reconsider the important issues of resonant processes, i.e., treatment of resonant propagators and including interference effects.

Comments: 4 pages, 1 figure, 1 table, proceedings of the 2nd Toyama Workshop on "Higgs as a Probe of New Physics 2015" (HPNP2015), 11-15 February 2015