Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-01-16
Nucl.Phys. B526 (1998) 136-152; Erratum-ibid. B582 (2000) 759-761
Physics
High Energy Physics
High Energy Physics - Phenomenology
19 pages, Latex, epsfig, 13 figures This revised version supersedes that published in Nucl. Phys. B526 (1998) 136, and contain
Scientific paper
10.1016/S0550-3213(98)00254-5
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 (q antiquark -> G G photon), and jet plus missing energy, induced by (q antiquark -> G G g), (q g -> G G q), and (g g -> G G g). 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 sqrt{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 sqrt{F} up to 410 GeV and 1.6 TeV, respectively.
Brignole Andrea
Feruglio Ferruccio
Mangano Michelangelo L.
Zwirner Fabio
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