Eur. Phys. J. C 23, 149-162 (2002)
https://doi.org/10.1007/s100520100865

Neutralinos in E₆ inspired supersymmetric U(1)' models

¹ Department of Physics, University of Wisconsin, Madison, WI 53706, USA
² Institut für Theoretische Physik und Astrophysik, Universität Würzburg, 97074 Würzburg, Germany

Corresponding authors: ^a hesselb@pheno.physics.wisc.edu - ^b fabian@physik.uni-wuerzburg.de - ^c fraas@physik.uni-wuerzburg.de

Received: 17 July 2001
Revised: 21 November 2001
Published online: 25 January 2002

Abstract

The neutralino sector in E₆ 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.