Abstract
A spin-1 Z’ particle as a single dark matter candidate is investigated by assuming that it does not directly couple to the Higgs boson and standard model fermions and does not mix with the photon and Z boson. The remaining dominant vertices are quartic Z ′ Z ′ ZZ and Z ′ Z ′ W + W −, which can induce effective \( {Z^{\prime }}{Z^{\prime }}q\overline{q} \) couplings through standard-model gauge-boson loops. We discuss constraints from the cosmological thermal relic density, and direct and indirect-detection experiments, and find that a dark Z’ can only exist above the W boson mass threshold, and the effective quartic coupling of Z ′ Z ′ VV is bounded in the region of 10−3~10−2.
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Chen, N., Zhang, Y., Wang, Q. et al. Higgsphobic and fermiophobic Z’ as a single dark matter candidate. J. High Energ. Phys. 2014, 88 (2014). https://doi.org/10.1007/JHEP05(2014)088
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DOI: https://doi.org/10.1007/JHEP05(2014)088