Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-06-09
Phys.Rev.D48:2978-2982,1993
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages plus 2 figures available upon request (revtex file), FSU-HEP-930527
Scientific paper
10.1103/PhysRevD.48.R2978
Within the supergravity framework, sleptons are expected to be considerably lighter than squarks if gluinos and squarks are approximately degenerate. This can lead to a significant enhancement in leptonic branching ratio for neutralinos, and sometimes, charginos. Using ISAJET 7.0/ISASUSY 1.0, we evaluate the multilepton signals from cascade decays of gluinos and squarks produced at the Fermilab Tevatron $p\bar p$ collider assuming squark and slepton masses are related as in supergravity models. We find observable cross sections for spectacular event topologies: $m$-lepton + $n$-jet + $\eslt$ events ($m \leq 4$, $n \geq 2$) and same-sign dilepton + $\eslt$ events and show that the SM backgrounds to the isolated trilepton, four lepton and same-sign dilepton signals are very small. These signals can extend the mass reach of the Tevatron experiments to $m_{\tg}\sim 300$~GeV if $m_{\tg}\sim m_{\tq}$ and ${\cal O}(1000)$ pb$^{-1}$ of data are collected.
Baer Howard
Kao Chi-Chang
Tata Xerxes
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