Neutral currents and Glashow-Iliopoulos-Maiani mechanism inSU(3)L⊗U(1)<

Abstract

We study the Glashow-Iliopoulos-Maiani mechanism for flavor-changing neutral-current suppression in both the gauge and Higgs sectors, for models with SU(3)z, Igt U(1)iv gauge symmetry. The models di6'er from one another only with respect to the representation content. The main features of these models are that in order to cancel the triangle anomalies the number of families must be divisible by three (the number of colors) and that the lepton number is violated by some lepton-gauge bosons and lepton-scalar interactions.

Anomalous magnetic moment of muon in 3–3–1 models

“…(ν, l, ν c ) L (hereafter we call it a model with right-handed neutrino [10,11]). New gauge bosons in the minimal model are bileptons (Y ± , X ±± ) carrying lepton number L = ±2 and Z ′ .…”

Neutrino mixing matrix in the 3-3-1 model with heavy leptons andA4symmetry

“…Next, (ηϕ iL )(η i ϕ jL ), which is formed by 3 × 3 × 3, has the form η(ϕ 1L η 2 ϕ 3L + ϕ 2L η 3 ϕ 1L + ϕ 3L η 1 ϕ 2L ), and its analogous form. Thus, the operator (ηϕ iL )(η i ϕ jL ) contributes the term denoted by β in (20). Finally, the operator (η i ϕ jL ) 2 actually denotes schematically 4 different operators since it is formed by (3 × 3) × (3 × 3) and this contains 1 × 1, 1 ′ × 1 ′′ , 3 × 3, 3 × 3 and 3 × 3, corresponding respectively to the operators (…”

“…This is also true to the present version. This issue has been studied in a number of papers [20], so we will not discuss it further.…”

Custodial symmetry and extensions of the standard model

“…We have verified, using the general expressions given by Veltman [13], that j singlets 0, at least at the one loop level. Anyway, this issue has to be considered in a particular model in which the SU 2 L U 1 Y symmetry and the extra fermions may be imbedded [14,15].…”