High Energy Physics - Phenomenology
[Submitted on 28 Sep 2014 (v1), last revised 2 May 2015 (this version, v3)]
Title:NMSSM explanations of the Galactic center gamma ray excess and promising LHC searches
View PDFAbstract:The Galactic Center Excess (GCE) is explained in the framework of the Next-to-Minimal Supersymmetric Standard Model (NMSSM) with a $Z_3$ discrete symmetry. We show that a resonant CP-odd Higgs boson with mass twice that of the Dark Matter (DM) candidate is favoured. Meanwhile, the DM candidate is required to have relatively large coupling with the $Z$ boson through its Higgsino component in order to obtain correct DM relic density. Its LHC discovery potential via four signatures is discussed in detail. We find that the most sensitive signals are provided by the Higgsino-like chargino and neutralino pair production with their subsequent decays into $W$ bosons, $Z$ bosons, and DM. The majority of the relevant parameter space can be probed at the Large Hadron Collider with a centre-of-mass energy of 14 TeV and an integrated luminosity 1000 fb$^{-1}$.
Submission history
From: Jinmian Li [view email][v1] Sun, 28 Sep 2014 02:46:42 UTC (564 KB)
[v2] Thu, 2 Oct 2014 12:12:10 UTC (565 KB)
[v3] Sat, 2 May 2015 01:37:20 UTC (475 KB)
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