We study the one loop new physics effects to the CP even triple neutral gauge
boson vertices γ⋆γZ, γ⋆ZZ, Z⋆Zγ
and Z⋆ZZ in the context of Little Higgs models. We compute the
contribution of the additional fermions in Littles Higgs model in the framework
of direct product groups where [SU(2)×U(1)]2 gauge symmetry is
embedded in SU(5) global symmetry and also in the framework of simple group
where SU(N)×U(1) gauge symmetry breaks down to SU(2)L​×U(1). We
calculate the contribution of the fermions to these couplings when T parity
is invoked. In addition, we re-examine the MSSM contribution at the chosen
point of SPS1a' and compare with the SM and Little Higgs models.Comment: 19 pages, 5 figures, 3 table