Heavy bottom squark mass in the light gluino and light bottom squark scenario

Abstract

Restrictive upper bounds on the heavy bottom squark mass when the gluino and one bottom squark are both light are based on the predicted reduction of $R_b$ (the fraction of $Z$ hadronic decays to $b\bar{b}$ pairs) in such a scenario. These bounds are found to be relaxed by the process $Z\to b\overline{\stackrel{~}{b}}\tilde{g}/\bar{b}\tilde{b}\tilde{g}$, which may partially compensate for the reduction of $R_b$. The relaxation of bounds on the top squark and the scale-dependence of the strong coupling constant are also discussed.

9 pages, LaTeX, 2 figures, to be submitted to Phys. Lett. B, more discussions added

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• Constraints on a Very Light Sbottom
• Light Gluino Constituents of Hadrons and a Global Analysis of Hadron Scattering Data
• Squark Mixing in Electron-Positron Reactions
• Phenomenological study of the atypical heavy flavor production observed at the Fermilab Tevatron
• Can there be a heavy sbottom hidden in three-jet data at LEP?