WIMPs in a 3-3-1 model with heavy sterile neutrinos

Abstract

In this work we build a gauge model based on the SUð3Þ c SUð3Þ L Uð1Þ N symmetry with heavy neutrinos and show that we can have two weakly interacting cold dark matter candidates in its spectrum. This is achieved by noticing that a global Uð1Þ symmetry can be imposed on the model in such a way that the stability of the dark matter is guaranteed. We obtain their relic abundance and analyze their compatibility with recent direct detection experiments, also exploring the possibility of explaining the two events reported by CDMSII. An interesting outcome of this 3-3-1 model, concerning direct detection of these WIMPs, is a strong bound on the symmetry breaking scale, which imposes it to be above 3 TeV.

Explaining dark matter and B decay anomalies with an L μ − L τ model

“…It is important to first notice that the Z gauge boson arising from the L µ − L τ local symmetry dictates a dark matter phenomenology rather different from other realizations of a "dark Z portal" (see e.g. [67][68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84]). For example, the dark matter pair annihilation exclusively yields muon, tau, and neutrino pairs, as well as Z boson pairs, if kinematically allowed (i.e.…”

A variant of 3-3-1 model for the generation of the SM fermion mass and mixing pattern

“…(vi) These models contain a natural Peccei-Quinn symmetry, which solves the strong-CP problem [111][112][113][114]. (vii) The 3-3-1 models with heavy sterile neutrinos include cold dark matter candidates as weakly interacting massive particles (WIMPs) [115][116][117][118]. A concise review of WIMPs in 3-3-1 Electroweak Gauge Models is provided in ref.…”

A Brief Review on WIMPs in 331 Electroweak Gauge Models

“…where, g is the standard electroweak gauge coupling, s W (and c W ) refers to the Sine (and Cosine) of the electroweak mixing angle and Given the approximations made over the parameters to obtain analytic expressions for the massive CP-even scalar eigenstates, described in (Pires and Silva, 2007;Mizukoshi et al, 2011), we have:…”

“…Another variation with a second neutral fermion in the 331 leptonic triplet, that allows for a WIMP in the spectrum was considered in (Mizukoshi et al, 2011), the 331LHN model. As we mentioned, the difference between the 331RHν and the 331LHN is in the character of the third component of leptonic triplet, which in the later model is a new neutral left handed fermion, N L , besides its right handed component, N R , as a singlet under the gauge symmetry.…”

“…Besides, it is possible for some versions of 331 model to present a natural CDM candidate as a WIMP (Pires and Silva, 2007;Mizukoshi et al, 2011) and it is this specific topic in the context of 331 models that we want to discuss in this review.…”