Erratum to “Signals of a superlight gravitino at hadron colliders when the other superparticles are heavy” [Nucl. Phys. B 526 (1998) 136]

Abstract

If the gravitino G is very light and all the other supersymmetric particles are above threshold, supersymmetry may still be found at colliders, by looking at processes with only gravitinos and ordinary particles in the final state.We compute here the cross-sections for some distinctive signals at hadron colliders: photon plus missing energy, induced by qq → G Gγ, and jet plus missing energy, induced by qq → G Gg, qg → G Gq, qg → G Gq and gg → G Gg. From the present Tevatron data, we estimate the bound m 3/2 > 2.3 × 10 -5 eV on the gravitino mass, corresponding to the bound √ F > 310 GeV on the supersymmetry-breaking scale.We foresee that the upgraded Tevatron and the LHC will be sensitive to values of m 3/2 up to 4.0 × 10 -5 eV and 6.2 × 10 -4 eV, corresponding to √ F up to 410 GeV and 1.6 TeV, respectively.This revised version supersedes that published in Nucl.Phys.B526 (1998) 136, and contains important changes.The correction of a sign error modifies the relevant partonic cross-sections.The sensitivity to √ F (m 3/2 ) is only slightly weakened.