A Non-supersymmetric Interpretation of the CDF e+e-γγ+ missing E_T Event

Abstract

The $\eegg$ event reported recently by the CDF Collaboration has been interpreted as a signal of supersymmetry in several recent papers. In this article, we report on an alternative non-supersymmetric interpretation of the event using an extension of the standard model which contains new physics at the electroweak scale that does not effect the existing precision electroweak data. We extend the standard model by including an extra sequential generation of fermions, heavy right-handed neutrinos for all generations and an extra singly charged SU(2)-singlet Higgs boson. We discuss possible ways to discriminate this from the standard supersymemtric interpretations.

7 pages, Latex, no figures

References in corpus (4)

• Experimental Signatures of Low Energy Gauge Mediated Supersymmetry Breaking
• Supersymmetric analysis and predictions based on the CDF eeγγ+ missing E_T event
• Implications of Low Energy Supersymmetry Breaking at the Tevatron
• Fourth-Generation Leptons at LEP2

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• Searches for New Physics in Diphoton Events in proton anti-proton collisions at sqrt(s)=1.8TeV
• Supersymmetric Scenarios with Dominant Radiative Neutralino Decay
• Low energy supersymmetry with a neutralino LSP and the CDF eeγγ+ missing E_T event
• Search for a Fourth Generation Charge -1/3 Quark via Flavor Changing Neutral Current Decay
• Search for Anomalous Production of Events with Two Photons and Additional Energetic Objects at CDF
• The Search for Supersymmetry at the Tevatron Collider
• An E${}_6$ interpretation of an $e^{+}{e}^{-}\gamma \gamma E{/}_T$ event
• Anomalous Production of Fourth Family Up Quarks at Future Lepton Hadron Colliders
• Perspectives for Detection of a Higgsino-like Relic Neutralino