Anomalies and decoupling of charginos and neutralinos in the MSSM

Details Anomalies and decoupling of charginos and neutralinos in the MSSM Anomalies and decoupling of charginos and neutralinos in the MSSM

1997-05-30

arxiv.org/abs/hep-ph/9705476v1

Phys.Rev. D56 (1997) 523-526

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, standard Latex, accepted in phys. rev. d

Scientific paper

10.1103/PhysRevD.56.523

We study the contribution of charginos and neutralinos of the Minimal SUSY extension of the Standard model (MSSM) to the 1-loop vertices ZAA, ZZA, ZZZ, and examine the related cancellation of anomalies. It is found that when the SUSY parameter \mu satisfies |\mu| >> M,M', m_W, the couplings of charginos and neutralinos with the gauge bosons become purely vectorial, and then their contribution to the amplitudes for ZAA, ZZA and ZZZ vanish, which implies that this sector of the MSSM does not generate a Wess-Zumino term. We evaluate also the contribution of charginos and neutralinos to the \rho parameter, and find that \rho=0 in the large-\mu limit.

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