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arXiv · hep-ph/9511259

Light Higgsino Detection at LEP1.5

S. Ambrosanio·M. Carena·B. Mele·C. E. M. Wagner
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Abstract

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 ($\sqrt{s}=140$ 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 ($μ,M_2$) plane for values of $M_2 \simlt 1$ 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.

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S. Ambrosanio, M. Carena, B. Mele, C. E. M. Wagner. 1996-10-17. Light Higgsino Detection at LEP1.5. https://doi.org/10.1016/0370-2693(96)00129-3

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