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No-scale supergravity confronts LEP diphoton events

We note that two acoplanar diphoton events observed at LEP, by OPAL at sqrt{s}=130 GeV and by L3 and sqrt{s}=161 GeV, are consistent with the predictions of our previously proposed one-parameter no-scale supergravity model with a light gravitino, via the process e^+e^- -> chi chi -> gamma gamm...

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Detalles Bibliográficos
Autores principales: Lopez, Jorge L., Nanopoulos, Dimitri V., Zichichi, A.
Lenguaje:eng
Publicado: 1996
Materias:
Acceso en línea:http://cds.cern.ch/record/312084
Descripción
Sumario:We note that two acoplanar diphoton events observed at LEP, by OPAL at sqrt{s}=130 GeV and by L3 and sqrt{s}=161 GeV, are consistent with the predictions of our previously proposed one-parameter no-scale supergravity model with a light gravitino, via the process e^+e^- -> chi chi -> gamma gamma+E_miss for m_chi \approx (50-60) GeV. This region of parameter space is also consistent with the chargino interpretations of the CDF ee gamma gamma + E_T,miss event.