Decays Z' -> γγγ and Z -> γγγ in the minimal 331 model

Details Decays Z' -> γγγ and Z -> γγγ in the minimal 331 model Decays Z' -> γγγ and Z -> γγγ in the minimal 331 model

2011-10-16

arxiv.org/abs/1110.3446v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages and 20 figures

Scientific paper

The possibility of a significant effect of exotic particles on the Z'->\gamma\gamma\gamma{} and Z->\gamma\gamma\gamma{} decays is investigated in the context of the minimal 331 model. This model, which is based in the SU_C(3)xSU_L(3)xU_X(1) gauge group, predicts the existence of many exotic charged particles that can significantly enhance the decay widths. It is found that the standard model prediction for the Z->\gamma\gamma\gamma{} decay remains essentially unchanged, as the new physics effects quickly decouples. On the other hand, it is found that the contributions of the new exotic quarks and gauge bosons predicted by this model lead to a branching fraction for the Z'->\gamma\gamma\gamma{} decay of about 10^(-6), which is about three orders of magnitude larger than that of the Z->\gamma\gamma\gamma{} decay.

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