Testing supersymmetry interpretations of anomalous missing-pTevents observed at the CERNpp¯collider

Abstract

We compare predictions of three supersymmetry scenarios [(A) $m_{g̃}$>$m_{q̃}$ ≃50 GeV, (B) $m_{q̃}$>$m_{g̃}$ ≃50 GeV, and (C) $m_{q̃}$ ≃100 GeV, $m_{g̃}$ ≃3 GeV] proposed to explain large-missing-$p_T$ events at the CERN pp¯ collider in terms of scalar-quark or gluino decays to a light photino. We evaluate fusion cross sections for monojets and multijets and present distributions in missing $p_T$, jet $E_T$, jet pseudorapidity, jet invariant mass, and cluster transverse mass. Scenarios A and B give about equal one-jet and two-jet event rates, soft missing-$p_T$ and jet-$E_T$ distributions and occasional prompt leptons; scenario B gives large jet invariant masses, even for monojets. Scenario C yields monojet dominance and Jacobian peaks in missing $p_T$ and jet $E_T$; the present UA1 data favor this latter description.