1995/11/30 by S. Ambrosanio, M. Carena, Marcela Carena +3 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1016/0370-2693(96)00129-3
published as Phys.Lett.B373:107-116,1996 · 16 pages, 8 Figures, LateX. Figures now include initial state radiation effects on the cross sections.
openalex publication_date 1996/04/01 · arxiv created 1996/10/17 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Within the minimal supersymmetric extension of the Standard Model, the best fit to the most recent precision-measurement data requires charginos and neutralinos, with dominant Higgsino components and with masses within the reach of LEP1.5 (√(s)=140 GeV). In this work, we present a detailed analysis of the neutralino and chargino production processes for the favoured region of parameter space, that is low values of |μ| and either low or large values of tanβ. We find that chargino and neutralino searches can cover the Higgsino region in the (μ,M2) plane for values of M2 \simlt 1 TeV, at the next phases of the LEP collider. We also show that, due mainly to phase-space constraints, the lightest neutralinos should be more easily detectable than charginos in most of the parameter space preferred by precision-measurement data.