Mono-Z' Signatures in the B-L Supersymmetric Standard Model at the LHC

TL;DR

This paper investigates mono-Z' signatures in the B-L Supersymmetric Standard Model at the LHC, analyzing leptonic decay channels to identify signals of dark matter candidates independent of their specific nature.

Contribution

It introduces a method to detect mono-Z' events in the BLSSM-IS framework, focusing on leptonic decays to distinguish signals from background.

Findings

Mono-Z' events can be produced with a singlet Higgs decaying into LSPs.

Kinematic distributions of leptons and missing energy can reveal the signal.

Analysis is independent of the dark matter particle's specific identity.

Abstract

The B-L Supersymmetric Standard Model with Inverse Seesaw (BLSSM-IS) extends the Minimal Supersymmetric Standard Model (MSSM) by incorporating a gauged B-L symmetry, right-handed neutrinos and an additional neutral gauge boson Z'. Searches at the Large Hadron Collider (LHC) constrain the mass of this gauge boson to be as low as only ~ 2.2 TeV in the BLSSM-IS, owing to interference effects with the SM. In this framework, mono-Z' events can arise from the associated production of a Z' boson and a singlet Higgs boson h', where h' subsequently decays into missing energy carried by a pair of the Lightest Supersymmetric Particle (LSP) - either a neutralino or a right-handed sneutrino - which serves as a Dark Matter (DM) candidate. Focusing on leptonic decays of the Z' (electrons and muons), we analyse the kinematic distributions of the final-state leptons and the missing transverse energy in order to extract a signal for this process which is independent of the nature of the BLSSM-IS DM.