Supersymmetric photonic signals at LEP
J. Lopez, D. Nanopoulos, A. Zichichi
Abstract
We explore and contrast the single-photon and diphoton signals expected at LEP 2, that arise from neutralino-gravitino (e+ e- -> chi + gravitino -> gamma + Emiss) and neutralino-neutralino (e+ e- -> chi + chi -> gamma + gamma + Emiss) production in supersymmetric models with a light gravitino. LEP 1 limits imply that one may observe either one, but not both, of these signals at LEP 2, depending on the values of the neutralino and gravitino masses: single-photons for mchi > Mz and mgravitino < 3 x 10-5 eV; diphotons for mchi < Mz and all allowed values of mgravitino.
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