Inclusive Search for Squark and Gluino Production in ppbar Collisions at sqrt{s} = 1.96 TeV

TL;DR

This study searches for squark and gluino production in proton-antiproton collisions at 1.96 TeV, finding no evidence but setting upper limits on their production cross sections and mass exclusions within a specific supersymmetry model.

Contribution

First search for inclusive squark and gluino production at Tevatron energies using 2 fb-1 data, establishing new mass exclusion limits in a minimal supergravity scenario.

Findings

No evidence for squark or gluino production.

Set 95% C.L. upper limits on cross sections between 0.1 pb and 1 pb.

Excluded gluino masses below 280 GeV/c2 and degenerate squark-gluino masses below 392 GeV/c2.

Abstract

We report on a search for inclusive production of squarks and gluinos in ppbar collisions at sqrt{s}=1.96 TeV, in events with large missing transverse energy and multiple jets of hadrons in the final state. The study uses a CDF Run II data sample corresponding to 2 fb-1 of integrated luminosity. The data are in good agreement with the standard model predictions, giving no evidence for any squark or gluino component. In an R-parity conserving minimal supergravity scenario with A_0 = 0, mu < 0 and tanbeta = 5, 95% C.L. upper limits on the production cross sections in the range between 0.1 pb and 1 pb are obtained, depending on the squark and gluino masses considered. For gluino masses below 280 GeV/c2, arbitrarily large squark masses are excluded at the 95%C.L., while for mass degenerate gluinos and squarks, masses below 392 GeV/c2 are excluded at the 95% C.L.