Phenomenology of ``inos'' in the Light Gaugino Scenario and Possible Evidence for a 53 GeV Chargino
Glennys R. Farrar
Abstract
The tree-level-massless gaugino scenario predicts that the lighter chargino mass is less than mW and that gluino and lightest neutralino masses are 1 GeV. In this case the dominant decay mode of charginos and non-LSP neutralinos is generically to three jets. The excess of "4j" events with total invariant mass 105 GeV observed in LEP running at 130-136 GeV is noted to be consistent with pair production of 53 GeV charginos. Data at 161 and 172 GeV from Fall, 1996, cannot conclusively test this hypothesis (because cuts to eliminate W+W- background reduce the efficiency significantly) but is suggestive that the signal persists.
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