Probing a Mixed Neutralino Dark Matter Model at the 7 TeV LHC

TL;DR

This paper evaluates the potential of the 7 TeV LHC to detect a mixed bino-higgsino dark matter model with distinctive SUSY features, demonstrating viable signals up to gluino masses of 800 GeV.

Contribution

It introduces a non-universal gaugino mass model with unique mass spectrum features and assesses its detectability at the 7 TeV LHC.

Findings

Viable signals for gluino masses up to 800 GeV.

Distinctive SUSY spectrum features enable detection.

Model consistent with cosmological dark matter relic density.

Abstract

We have analyzed the prospect of probing a non-universal gaugino mass model of mixed bino-higgsino dark matter at the current 7 TeV run of LHC. It provides cosmologically compatible dark matter relic density over two broad bands of parameters, corresponding to $m_{\gl} < m_{\sq}$ and $m_{\gl} \sim m_{\sq}$. The SUSY spectrum of this model has two distinctive features : (i) an approximate degeneracy among the lighter chargino and neutralino masses, and (ii) an inverted mass hierarchy of squark masses. We find that these features can be exploited to obtain a viable signal upto $m_{\gl} \sim$ 800 GeV over both the parameter bands with an integrated luminosity 5/fb.