Neutralinos in E_6 inspired supersymmetric U(1)' models

Details Neutralinos in E_6 inspired supersymmetric U(1)' models Neutralinos in E_6 inspired supersymmetric U(1)' models

2001-07-09

arxiv.org/abs/hep-ph/0107080v2

Eur.Phys.J.C23:149-162,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, LaTeX, 5 eps figures; version to be published in EPJ C

Scientific paper

10.1007/s100520100865

The neutralino sector in E_6 inspired supersymmetric models with extra neutral gauge bosons and singlet Higgs fields contains additional gaugino and singlino states compared to the MSSM. We discuss the neutralino mixing in rank 5 and rank 6 models and analyze the supersymmetric parameter space where the light neutralinos have mainly singlino or MSSM character. The neutralino character, resonance effects of the new gauge bosons and, assuming mSUGRA-type RGEs, different selectron masses lead to significant differences between the MSSM and the extended models in neutralino production at an e^+e^- linear collider. Beam polarization may improve the signatures to distinguish between the models. In an appendix, we present the mass terms of the gauge bosons, charginos and sfermions which show a significant different mass spectrum than in the MSSM and give all relevant neutralino couplings.

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