Is the ee gamma gamma+ Missing E(T) Event an Evidence of the Light Axino?
J. Hisano, K. Tobe, T. Yanagida
Abstract
We point out that if the Peccei-Quinn symmetry breaking scale Fa is in a range of the hadronic axion window (Fa 106GeV), the eeγγ+/\!\!\!\! ET event in the CDF experiment can be naturally explained by a no-scale supergravity model with a light axino. We also stress that the hadronic axion window still survives the intergalactic photon search, since a large entropy production due to the decay of Polonyi field yields a substantial dilution of the cosmic axion density.
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