Abstract
We revisit the status of a Majorana fermion as a dark matter candidate when a sequential Z' gauge boson dictates the dark matter phenomenology. Direct dark matter detection signatures rise from dark matter-nucleus scatterings at bubble chamber and liquid xenon detectors, and from the flux of neutrinos from the Sun measured by the IceCube experiment, which is governed by the spin-dependent dark matter-nucleus scattering. On the collider side, LHC searches for dilepton and mono-jet + missing energy signals play an important role. The relic density and perturbativity requirements are also addressed. By exploiting the dark matter complementarity we outline the region of parameter space where one can successfully have a Majorana dark matter particle in light of current and planned experimental sensitivities.
Highlights
The existence of dark matter (DM) is a fact that has been accumulating evidence since the early 1970s
In the plots the parameter space accounting for the correct DM relic density is compared with the limits from the most relevant dark matter observables taking into account current and future experimental sensitivities to outline the region where one can have a viable Majorana fermion as dark matter
The results presented in this paper are recovered by assuming that the mass of S is higher than MZ0, in order to marginalize its influence in DM processes
Summary
The existence of dark matter (DM) is a fact that has been accumulating evidence since the early 1970s (or even before if we consider the analysis done by Franz Zwicky in 1933 that led to him coining the term Dunkle Materie [1]). Weakly interacting massive particles (WIMPs) stand out for being able to reproduce the observed relic abundance in a rather natural way and predict signals at current or planned experiments [2]. Despite this theoretical motivation and intense experimental efforts, the existence of WIMPs has not yet been established (for a recent review see [3]), for which distinct candidates and their possible signals in different detectors must be explored.
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