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Constraining the minimal dark matter fiveplet with LHC searches
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abstract
Adding a fermion to the standard model particle content which is a fiveplet under $SU(2)_L$ gives a dark matter candidate. The lightest state in the multiplet is neutral and automatically stable. The charged component of the multiplet is only slightly heavier and can travel a finite distance in the LHC detectors before decaying, leaving a charged track which disappears before the edge of the detector. We use the recent ATLAS and CMS searches to exclude a Majorana fiveplet with a mass up to 267 GeV. We estimate that with 3 ab$^{-1}$ of $\sqrt{s}=14$ TeV data this could be pushed to a mass 520 GeV. These exclusions are $\sim 10\%$ greater than what is achieved for wino-like dark matter. We also discuss how the doubly charged states could be used to distinguish a disappearing track signal from that given by a triplet such as the pure wino.
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Cited by 1 Pith paper
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Minimal Dark Matter in the sky: updated Indirect Detection probes
Fermi-LAT data exclude the lower end of the Minimal Dark Matter 5-plet thermal mass window, while about 600 hours of CTAO observations of Ursa Major II could probe the central mass.
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