Minimal Z′ models for flavor anomalies

Abstract

By allowing gauge anomaly cancellation between fermions in different families we find a nonuniversal solution for a Z family of models with the same content of fermions of the standard model plus three right-handed neutrinos. We also impose constraints from the Yukawa interaction terms in such a way that at the end we obtain a solution with six free parameters. Our solution contains as particular cases well-known models in the literature. As an application, we report a model which evades LHC constraints, flavor changing neutral currents and low energy constraints. Simultaneously, the model is able to explain the flavor anomalies in the Wilson coefficients C9(µ) and C10(µ) without modifying the corresponding Wilson coefficients for the first family. In our approach this procedure is always possible for Z masses smaller than ∼ 2.5 TeV.

Systematic study of the SU(3) c ⊗SU(3) L ⊗ U(1) X local gauge symmetry

“…Simple extensions of the local gauge group consider an electroweak sector with an extra abelian symmetry SU(2) L ⊗ U (1) x ⊗ U(1) z [24,25], or either the so called left right symmetric model SU (2) L ⊗ SU(2) R ⊗ U(1) (B−L) [26][27][28][29], and also SU(3) L ⊗ U(1) X , being the last one we are going to consider in this study [30][31][32][33][34][35].…”

Systematic study of the $SU(3)_c\otimes SU(3)_L\otimes U(1)_X$ local gauge symmetry

“…Simple extensions of the local gauge group consider an electroweak sector with an extra abelian symmetry SU(2) L ⊗U (1) x ⊗U(1) z [24,25], or either the so called left right symmetric model SU(2) L ⊗ SU(2) R ⊗ U(1) (B−L) [26][27][28], and also SU(3) L ⊗ U(1) X , being the last one we are going to consider in this study [29][30][31][32][33].…”