$Z^{\prime}_{B-L}$ phenomenology at LHC

TL;DR

This paper analyzes the potential of the LHC to distinguish between two $U(1)_{B-L}$ extended models of the Standard Model by studying $Z'$ boson signals in muon pair production at different energies and luminosities.

Contribution

It compares two $B-L$ models at the LHC using various observables to identify the $Z'$ properties and differentiate the models from the Standard Model background.

Findings

Certain observables can distinguish the $Z'$ models from the SM background.

Kinematic cuts help extract properties of the $Z'$ boson.

The analysis covers different LHC energies and luminosities.

Abstract

We study the $Z^\prime$ phenomenology for two extensions of the Electroweak Standard Model (SM) which have an extra $U(1)_{B-L}$ gauge factor. We show the capabilities of the LHC in distinguishing the signals coming from these two extensions and both of them from the Standard Model background. In order to compare the behavior of these $B-L$ models we consider the reaction $p + p\longrightarrow \mu^+ + \mu^- + X$ and compute some observables as the total cross sections, number of events, forward-backward asymmetry, final particle distributions like rapidity, transverse momentum, and dimuon invariant mass, for two LHC regimes: $\sqrt{s}\,({\cal L})=7$ TeV ($1\, \textrm{fb}^{-1}$) and $14 $ TeV ($100\, \textrm{fb}^{-1}$) for $M_{Z^{\prime}}$ = 1000 GeV and 1500 GeV. We show that by using appropriate kinematic cuts some of the observables considered here are able to extract different properties of the $Z^\prime$ boson, and hence providing information about to which $B-L$ model it belongs to.