Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-02-07
Phys.Rev.Lett. 76 (1996) 3498-3501
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, LaTeX, uses epsf.sty, 4 encapsulated Postscript figures. Improved referencing. Minor changes in text and numbers, no
Scientific paper
10.1103/PhysRevLett.76.3498
We have analyzed the single $\eegg + \slashchar{E}_T$ event at CDF and found that the expected rate and kinematics are consistent with selectron pair production. We consider two classes of general low-energy supersymmetric theories, where either the lightest neutralino (``neutralino LSP'' scenario) or the gravitino (``light gravitino'' scenario) is the lightest supersymmetric particle. The parameter space of the supersymmetric Lagrangian is tightly constrained by the kinematics of the event and the branching ratios for the necessary decay chain of the selectron. We identify a region of the parameter space satisfying all low-energy constraints, and consistent with the selectron interpretation of the $ee\gamma\gamma + \Et$ event. We discuss other supersymmetric processes at Fermilab Tevatron and at CERN LEP in both scenarios that could confirm or exclude a supersymmetric explanation of the event, and that could distinguish between the neutralino LSP and the light gravitino scenarios.
Ambrosanio Sandro
Kane Gordon L.
Kribs Graham D.
Martin Stephen P.
Mrenna Stephen
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