$Z^{\prime}$ boson signal at Tevatron and LHC in a 331 model

TL;DR

This paper investigates the detection prospects of a new $Z^{\u2212}$ boson predicted by a 331 model with right-handed neutrinos at Tevatron and LHC, providing exclusion limits and potential signals in di-electron events.

Contribution

It presents the first analysis of $Z^{\u2212}$ boson signals in a 331 model at Tevatron and LHC, including exclusion bounds and expected event distributions for various masses.

Findings

$Z^{\u2212}$ boson excluded below 920 GeV at Tevatron.

At LHC with 100 fb$^{-1}$, a $Z^{\u2212}$ at 1500 GeV yields 800 signal events.

Event counts decrease from 10,000 to 1 for masses between 1 and 5 TeV.

Abstract

We analyse the possibilities to detect a new $Z^{\prime}$ boson in di-electron events at Tevatron and LHC in the framework of the 331 model with right-handed neutrinos. Using $p\bar{p}$ collision data collected by the CDF II detector at Fermilab Tevatron, we find that the 331 $Z^{\prime}$ boson is excluded with masses below 920 GeV. For an integrated luminosity of $100 fb^{-1}$ at LHC, and considering a central value $M_{Z^{\prime}}=1500$ GeV, we obtain the invariant mass distribution in the process $pp\to Z^{\prime}\to e^{+}e^{-}$, where a huge peak, corresponding to 800 signal events, is found above the SM background. The number of di-electron events vary from 10000 to 1 in the mass range of $M_{Z^{\prime}}=1000-5000$ GeV.