A Blind Search for Supersymmetry in $p \bar{p}$ Collisions at $\sqrt{s}$ = 1.8-TeV using the Missing Energy Plus Multijet Channel

Abstract

A data sample of 84.37 $pb^{-1}$ of $p\bar{p}$ collisions at $\sqrt{s}$ = 1.8 TeV recorded by the Collider Detector at Fermilab is analyzed in search of scalar quarks (squarks, $^\sim_q$) and gluinos ($^\sim_g$). The nal state of large missing energy plus $\ge$3 jets, characteristic of hadroproduction and subsequent decays of squarks and gluinos within the minimal supersymmetry and supergravity frameworks with R-parity conservation, is used in the search. The $blind$ analysis method is followed to avoid biases in the data selection. The search is negative at 95% C.L. for gluino masses below 300 GeV/$c^2$ for the case $m_{^\sim_q} \approx m_{^\sim_g}$ and 195 GeV/$c^2$ independent of the squark mass. Being that the limit on the gluino mass provides tight ne-tuning constraints on low-energy supersymmetry the result of this search has phenomenological implications on models with unication constraints. It also demonstrates that the missing energy plus multijet channel is a powerful probe for supersymmetry in the upcoming Tevatron Collider run.