Eur. Phys. J. C (2007) 50: 909-917
https://doi.org/10.1140/epjc/s10052-007-0254-2

Regular Article - Theoretical Physics

Extra neutral gauge boson from two versions of the 3-3-1 model in future linear colliders

¹ Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
² Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil

^* e-mail: yara@if.ufrj.br

Received: 17 November 2006
Revised: 1 February 2007
Published online: 15 March 2007

Abstract

Our aim is to establish some signatures of the extra gauge boson Z^′, predicted in two versions of the SU(3)_C×SU(3)_L×U(1)_X model and to show possible differences between these signatures. First, by considering the process e⁺+e^-→μ⁺+μ^-, we obtain some observables and next, by considering additional hadronic final states, we obtain lower bounds for M_Z′, within 95% C.L. We also include our preliminary results concerning pp̄ and pp collisions in order to support our conclusions about the possibility to discriminate different versions of the 3-3-1 model. From our analysis we conclude that linear colliders can show a clear signature for the existence of Z^′ predicted in the 3-3-1 model and also that it can discriminate the various versions.