Anomalies and decoupling of charginos and neutralinos in the MSSM
- Instituto de Fisica, BUAP, Ap. Postal J-48, 72500 Puebla, Puebla (Mexico)
We study the contribution of charginos and neutralinos of the minimal SUSY extension of the standard model (MSSM) to the one-loop vertices ZAA, ZZA, ZZZ, and examine the related cancellation of anomalies. It is found that when the SUSY parameter {mu} satisfies {vert_bar}{mu}{vert_bar}{gt}M,M{sup {prime}},m{sub 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 vanishes, 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. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 531996
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 1 Vol. 56; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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