Limits on Gravitino Production and New Processes with Large Missing Transverse Energy in p-pbar Collisions at sqrt(s)=1.8 TeV

TL;DR

This paper reports on a search for new physics involving large missing transverse energy in proton-antiproton collisions, setting limits on gravitino production and excluding certain supersymmetry breaking scales.

Contribution

The study provides the first experimental limits on light gravitino production in proton-antiproton collisions at 1.8 TeV, within Gauge Mediated Supersymmetry Breaking models.

Findings

No deviations from Standard Model background observed.

Set a 95% confidence level lower limit on the supersymmetry breaking scale sqrt(F) >= 217 GeV.

Excluded gravitino masses smaller than 1.1x10^-5 eV/c^2.

Abstract

Events collected by the Collider Detector at Fermilab (CDF) with an energetic jet plus large missing transverse energy can be used to search for physics beyond the Standard Model. We see no deviations from the expected background and set upper limits on the production of new processes. We consider in addition the production of light gravitinos within the framework of the Gauge Mediated Supersymmetry Breaking models and set a limit at 95% confidence level on the breaking scale sqrt(F) >= 217 GeV, which excludes gravitino masses smaller than 1.1x10^-5 eV/c^2.