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 (t) over bar for the Z' boson and those of the lepton-neutrino for the W' boson. We find that the present LHC data provides the most stringent lower bounds on the masses of the heavy gauge bosons, m(Z') > 1.8 TeV for sin(2)phi > 0.07 and m(W') > 2 TeV for sin(2) phi > 0.15, where phi is the mixing angle of two SU(2) gauge groups.