Direct search for heavy gauge bosons at the LHC in the nonuniversal SU(2) model

Abstract

We study the phenomenology of heavy gauge bosons at the LHC in a nonuniversal gauge interaction model with the separate electroweak SU(2) gauge group for the third generation. Considered are the Drell-Yan processes into the final states of dilepton, dijet, ${\tau }^{-}{\tau }^{+}$, and $t\bar{t}$ for $Z^{\prime }$ boson and those of lepton-neutrino for $W^{\prime }$ boson. We find that the present LHC data provides lower bounds on the masses of the heavy gauge bosons, $m_{Z^{\prime }},m_{W^{\prime }}>2$ TeV, more stringent than indirect bounds, when ${\sin }^2\varphi >0.15$ for the mixing angle of two SU(2) gauge groups.We also note that the study of heavy resonances into the third generation fermions may provide some valuable information in the future.

Comments: 7 pages, 4 figures