Abstract
In this paper, we study the experimental signatures of a gluophilic Z ′ at the LHC, in particular through the analysis of three jets or four tops events. The Z ′ couples to gluons through dimension six operators and the parameter space is constrained with experimental searches released at 7 and 8 TeV by CMS along these two different channels. Existing constraints coming from the study of dark matter where the Z ′ represents a possible mediator between the latter and the Standard Model are also included for comparison. Prospects at \( \sqrt{s}=13 \) TeV allow us to evaluate for which values of the parameter space a gluophilic Z ′ could be discovered during the next run of the LHC. In particular, we show that the analysis of the three jets invariant mass could provide a clear signal (>5σ) for masses of the Z ′ above 300 GeV. Four tops events bring in addition further discovery potential for heavy Z ′ (above ∼ 2 TeV). A combination of both signals in four top channels and three jets analyses during the next run of the LHC could thus provide a clear signal of the presence of a heavy gluophilic Z ′.
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Ducu, O., Heurtier, L. & Maurer, J. LHC signatures of a Z ′ mediator between dark matter and the SU(3) sector. J. High Energ. Phys. 2016, 6 (2016). https://doi.org/10.1007/JHEP03(2016)006
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DOI: https://doi.org/10.1007/JHEP03(2016)006