Search for Scalar Top and Scalar Bottom Quarks in $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV

TL;DR

This paper reports a search for scalar top and bottom quarks in proton-antiproton collisions at 1.8 TeV, finding no evidence of their production and setting limits on their properties based on the data.

Contribution

First search for scalar top and bottom quarks in proton-antiproton collisions at this energy, providing experimental limits on their existence.

Findings

No excess events observed beyond Standard Model predictions.

Excluded regions in scalar quark-neutralino parameter space.

Set upper limits on scalar quark production cross sections.

Abstract

We have searched for direct pair production of scalar top and scalar bottom quarks in 88 pb$^{-1}$ of $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV with the CDF detector. We looked for events with a pair of heavy flavor jets and missing energy, consistent with scalar top quark decays to a charm quark and a neutralino, or scalar bottom quark decays to a bottom quark and a neutralino. The numbers of events that pass our selection for each process show no deviation from Standard Model expectations. We compare our results to next-to-leading order calculations for the scalar quark production cross sections to exclude regions in scalar quark-neutralino parameter space.