1992/11/20 by J. Lopez, Jorge L. Lopez, D.V. Nanopoulos +4 · 5 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.48.2062
published as Phys.Rev.D48:2062-2072,1993 · 13 pages plus 14 postscript figures (not included)
arxiv created 1992/11/20 · openalex publication_date 1993/09/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We compute the number of trilepton events to be expected at Fermilab as a result of the reaction pp\ifmmode\else\textasciimacron\fi\ensuremath→\mathrm\ensuremathχ1^\ifmmode±\else\textpm\fi\mathrm\ensuremathχ20X, where \mathrm\ensuremathχ1^\ifmmode±\else\textpm\fi is the lightest chargino and \mathrm\ensuremathχ20 is the next-to-lightest neutralino. This signal is expected to have very little background and is the best prospect for supersymmetry detection at Fermilab if the gluino and squarks are beyond reach. We evaluate our expressions for all points in the allowed parameter space of two basic supergravity models: (i) the minimal SU(5) supergravity model including the severe constraints from proton decay and a not too young universe and (ii) a recently proposed no-scale flipped SU(5) supergravity model. We study the plausible experimental scenarios and conclude that a large portion of the parameter spaces of these models could be explored with 100 pb^\mathrm\ensuremath-1 of integrated luminosity. In the minimal SU(5) supergravity model chargino masses as high as 100 GeV could be probed. In the no-scale flipped model it should be possible to probe some regions of parameter space with m_\mathrm\ensuremathχ1^\ifmmode±\else\textpm\fi\ensuremath\lesssim175 GeV, therefore, possibly exceeding the reach of the CERN LEP II for chargino and neutralino (since m_\mathrm\ensuremathχ20\ensuremath\approxeqm_\mathrm\ensuremathχ1^\ifmmode±\else\textpm\fi) masses. In both models such probes would indirectly explore gluino masses much beyond the reach of Fermilab.