Novel sources of Flavor Changed Neutral Currents in the 331 RHN model

Abstract

Sources of Flavor Changed Neutral Currents (FCNC) emerge naturally from a well motivated framework called 3-3-1 with right-handed neutrinos model, 331RHN for short, mediated by an extra neutral gauge boson Z . Following previous works we calculate these sources and in addition we derive new ones coming from CP-even and -odd neutral scalars which appear due to their nondiagonal interactions with the physical standard quarks. Furthermore, by using 4 texture zeros for the quark mass matrices, we derive the mass difference terms for the neutral mesons systems K 0 −K 0 , D 0 −D 0 and B 0 −B 0 and show that, though one can discern that the Z contribution is the most relevant one for mesons oscillations purposes, scalars contributions play a role also in this processes and hence it is worthwhile to investigate them and derive new bounds on space of parameters. In particular, studying the B 0 −B 0 system we set the bounds M Z 4.2 TeV and MS 2 , MI 3 7.5 TeV in order to be consistent with the current measurements. *

A 331 WIMPy dark radiation model

“…This model is a compelling alternative to the SM with a smoking gun signature given by the presence of charged gauge bosons and scalars, as well as a spectrum of particles whose phenomenological aspects have been investigated extensively [23][24][25][26][27][28][29][30][31]. This model is also consistent with all electroweak bounds, while offering plausible explanations to many open problems in particle physics, such as dark matter [32][33][34] and the number of particle generations [35].…”

“…3-3-1 models potentially address important theoretical and phenomenological questions which remain unexplained within the SM, such as the number of particle families [35], certain dark matter signals [32,33], the possible Higgs to diphoton excess [23][24][25], electric charge quantization [44,45], etc. In addition, 3-3-1 models present a rich phenomenology which includes new scalars and gauge bosons, as extensively explored in the literature [26][27][28][29][30][31]. For these and many other reasons, 3-3-1 models stand as compelling alternatives to the SM.…”

Constraining the $$Z^{\prime }$$ Z ′ mass in 331 models using direct dark matter detection

“…[37] do apply to our model. A variety limits have been placed on the mass of this boson and they come from different sources [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53] and from different models. In summary, the bounds derived here on the mass of this boson are complementary to those.…”

“…In the latter setup the Z would be the mediator and therefore our bounds would apply up to some extent, because the couplings of the Z boson on those models are not so different from the model we investigate here. Moreover, these limits are complementary to other limits coming from colliders [37], Flavor Changing Neutral Current processes [38][39][40][41][42][43][44][45][46], electroweak corrections to the S,T,U parameters [47][48][49][50][51], and from muon decay [52,53]. More importantly, the limits on the mass of the Z found here imply a bound on the scale of symmetry breaking that forces all particle masses to lie at a few TeV, if one considers all couplings to be of order 1.…”

The muon anomalous magnetic moment in the reduced minimal 3-3-1 model

“…See Refs. [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42] for some of these.…”