Nonuniversal U(1)X extension to the MSSM with three families

Abstract

We propose a supersymmetric extension of the anomaly-free and three families nonuniversal U (1) model, with the inclusion of four Higgs doublets and four Higgs singlets. The quark sector is extended by adding three exotic quark singlets, while the lepton sector includes two exotic charged lepton singlets, three right-handed neutrinos and three sterile Majorana neutrinos to obtain the fermionic mass spectrum. By implementing an additional Z 2 symmetry, the Yukawa coupling terms are suited in such a way that the fermion mass hierarchy is obtained without fine-tuning. The effective mass matrix for SM neutrinos is fitted to current neutrino oscillation data to check the consistency of the model with experimental evidence, obtaining that the normal-ordering scheme is preferred over the inverse ones. The electron and up, down and strange quarks are massless at tree level, but they get masses through radiative correction at one loop level coming from the sleptons and Higgsinos contributions. We show that the model predicts a like-Higgs SM mass at electroweak scale by using the VEV according to the symmetry breaking and fermion masses.

A non-universal $U(1)_{X}$ extension to the Standard Model to study the $B$ meson anomaly and muon $g-2$

“…which provide a lower bound on v χ according to the recent bounds on Z searches which sets M Z > 4.1 TeV [24] for the Sequential Standard Model, so can be taken to be v χ > 15 TeV if g X ∼ g according to this bound. Nevertheless, the model prediction on the Z mass is above 6T eV from the pp → + − process [25] at 3σ. However, the smallness of s Z allows to approximate c Z ≈ 1, yielding then the total mixing among the neutral gauge bosons:…”

$\tildeν$ contributions to electron and muon EDM in an Inverse Seesaw Mechanism

“…χ /3 so it is reasonable to think of v χ and v χ , at least, at the TeV scale. Moreover, neutrino masses are explained by an Inverse Seesaw Mechanism resulting in the three active SM neutrinos and six heavy Majorana neutrino eigenstates [26].…”

“…( 9). The latter allows the presence of a 125 GeV scalar compatible with the Higgs boson as it can be detailed seen in [26]. Furthermore, it provides the masses of charginos, neutralinos and sparticles as free parameters since their energy scale would be expected at least at the TeV scale, making all superpotential and D-term contributions negligible in comparison.…”

“…The present work considers a non-universal U (1) X extension to the MSSM, consisting of four scalar doublets and four scalar singlets among other fermion singlets, which provides an explanation for fermion mass hierarchy [26], it is compatible with the PMNS matrix elements [27] and can explain the muon g − 2 anomaly [28], in an scenario where neutrino masses are explained by an Inverse Seesaw Mechanism. However, just like exotic neutrinos might have important contributions, the supersymmetric scenario implies that sneutrino contributions might be important as well.…”

Electric dipole moments of neutron and heavy quarks in the B-LSSM

“…In the Higgs sector, there are two Higgs doublets and three Higgs singlets, and the explicit forms are shown in the follow, More detail about the U(1) X SSM refer to the literature [21,24] or use SARAH to generate a complete one [25].…”