Determination of Non-Universal Supergravity Models at the Large Hadron Collider

TL;DR

This paper investigates a non-universal supergravity model at the LHC, focusing on identifying W boson decays and reconstructing supersymmetric particles to determine dark matter properties.

Contribution

It introduces a bi-event subtraction technique for W boson identification and mass reconstruction in non-universal supergravity models at the LHC.

Findings

Effective W -> jj decay identification achieved

Supersymmetric particle masses can be reconstructed

Dark matter content consistent with experimental data

Abstract

We examine a well motivated non-universal supergravity model where the Higgs boson masses are not unified with the other scalars at the grand unified scale at the LHC. The dark matter content can easily be satisfied in this model by having a larger Higgsino component in the lightest neutralino. Typical final states in such a scenario at the LHC involve W bosons. We develop a bi-event subtraction technique to remove a huge combinatorial background to identify W -> jj decays. This is also a key technique to reconstruct supersymmetric particle masses in order to determine the model parameters. With the model parameters, we find that the dark matter content of the universe can be determined in agreement with existing experimental results.