B meson decay anomaly with a nonuniversal U(1)′ extension

Abstract

We propose an extension of the standard model with an extra Uð1Þ 0 Abelian symmetry, three Higgs doublets and two Higgs singlets, where the new Uð1Þ 0 charges are flavor nonuniversal. As a result, the model introduces an enlarger particle spectrum in the TeV scale with large new physics possibilities. The model reproduces the mixing angles and mass structures of the quarks, charged and neutral leptons. We found scenarios where the observed anomaly of the B þ → K þ ll decay can be explained due to the existence of couplings with new extra fermions at the TeV scale. By modifying the parametrization of the mixing matrices, we found solution in the decoupling limit.

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

“…being such interaction lagrangians in agreement with [28] and showing that the interaction to the Z µ 2 gauge boson to left-handed leptons is highly suppressed while interaction to right-handed leptons depends directly on g X . At low energies, the momentum transfer trough intermediary particles is negligible, which makes the decay to be derived from the following effective Hamiltonian:…”