Signals of a superlight gravitino at e+e− colliders when the other superparticles are heavy
| Autor: | Ferruccio Feruglio, Fabio Zwirner, Andrea Brignole |
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| Rok vydání: | 1998 |
| Předmět: |
High Energy Physics - Theory
Physics Nuclear and High Energy Physics Particle physics Photon Missing energy High Energy Physics::Phenomenology FOS: Physical sciences Supersymmetry Upper and lower bounds High Energy Physics - Experiment Critical discussion High Energy Physics - Phenomenology High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Theory (hep-th) High Energy Physics::Experiment Gravitino Particle Physics - Phenomenology |
| Zdroj: | Nuclear Physics B. 516:13-28 |
| ISSN: | 0550-3213 |
| DOI: | 10.1016/s0550-3213(97)00825-0 |
| Popis: | 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-section for the process e^+ e^- ==> G G gamma, whose final state can give rise to a distinctive photon plus missing energy signal at present and future e^+ e^- colliders. We describe how the present LEP data can be used to establish a lower bound on the gravitino mass of order 10^{-5} eV. We conclude with a critical discussion of our results, comparing them with related ones and outlining possible generalizations. 17 pages, 5 figures, plain Latex. Sign of an interference term corrected, physics unchanged |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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