A Search for Scalar Bottom Quarks from Gluino Decays in $\bar{p}p$ Collisions at $\sqrt{s}=1.96$ TeV

Abstract

We searched for scalar bottom quarks in 156 pb${}^{-1}$ of {\bf $\bar{p}p$} collisions at {\bf $\sqrt{s}=1.96$} TeV recorded by the CDF II experiment at the Tevatron. Scalar bottom quarks can be produced from gluino decays in R-parity conserving models of supersymmetry when the mass of the gluino exceeds that of the scalar bottom quark. Then, a scalar bottom quark can decay into a bottom quark and a neutralino. To search for this scenario, we investigated events with large missing transverse energy and at least three jets, two or more of which were identified as containing a secondary vertex from the hadronization of $b$ quarks. We found four candidate events, where $2.6\pm 0.7$ are expected from standard model processes, and placed 95% confidence level lower limits on gluino and scalar bottom quark masses of up to 280 and $240\gevm$, respectively.

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Cited by in corpus (7)

• Testing the Majorana Nature of Gluinos and Neutralinos
• Light MSSM Higgs boson scenario and its test at hadron colliders
• Searches for Direct Pair Production of Supersymmetric Top and Supersymmetric Bottom Quarks in p-pbar Collisions at sqrt(s)=1.96 TeV
• Search for Gluino-Mediated Sbottom Production in p-pbar Collisions at sqrt(s)=1.96 TeV
• Constraints on color-octet fermions from a global parton distribution analysis
• Review of searches for Higgs bosons and beyond the standard model physics at the Tevatron
• Cosmo-Particle Searches for Supersymmetry at the Collider Detector at Fermilab