Heavy neutrinos and neutral gauge boson Z' at the LHC

TL;DR

This paper investigates how heavy neutrinos and a Z' gauge boson could be detected at the LHC within a B-L extended Standard Model, highlighting new decay channels that improve detection prospects.

Contribution

It introduces the impact of new Z' decay channels into heavy neutrinos on LHC bounds and identifies the 4l + 2 nu channel as most promising for detection.

Findings

Z' decay channels into heavy neutrinos relax mass bounds.

The 4l + 2 nu channel is optimal for detection.

Heavy neutrino signatures can be effectively probed at the LHC.

Abstract

We explore possible signatures for heavy neutrinos and neutral gauge boson, Z', in TeV scale B-L extension of the Standard Model (BLSM) with inverse seesaw mechanisms at the Large Hadron Collider. We show that due to new decay channels of Z' into heavy/inert neutrinos, the LHC stringent bounds imposed on Z' mass can be significantly relaxed. We analyze the pair production of heavy neutrinos decaying to four leptons plus two neutrinos, four jets plus two leptons, or three leptons plus two jets and one neutrino. We show that the 4l + 2 nu is the most promising decay channel for probing both Z' and heavy neutrinos at the LHC.