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 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) similar to 10(-2).

Higgsphobic and fermiophobic Z' as a single dark matter candidate

Panizzi L
2014-01-01

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 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) similar to 10(-2).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/360841
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