Neutralino Production as SuSy Discovery Process at CERN LEP2

Abstract

A thorough study is performed on pair production and signatures of supersymmetric neutralinos in the MSSM at LEP2. Particular attention is paid to the region of the SuSy parameter space where the associated production of lightest and next-to-lightest neutralinos is the only visible allowed supersymmetric process. In that region, the signal is critically dependent on the selectron masses m(e_L,R). For sqrt(s)/2 < m(e_L,R) < 200-300 GeV and charginos above the threshold for pair production, neutralinos arising from e+e- --> X0(1)X0(2) could be the only SuSy signal detectable at LEP2.

37 pages, no figures, REVTeX. A gzipped postscript file of the complete paper (48 pages, 24 figs) is available via anonymous ftp at ftp://hpteo.roma1.infn.it/pub/preprints/ambr-mele/Rome1-1094.ps.gz (2.7Mb --> 16 Mb). Error in Higgs couplings corrected. Some comments and 3 figures added. In press in Phys. Rev. D

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