Is the ee gamma gamma+ Missing E(T) Event an Evidence of the Light Axino?

Details Is the ee gamma gamma+ Missing E(T) Event an Evidence of the Light Axino? Is the ee gamma gamma+ Missing E(T) Event an Evidence of the Light Axino?

1996-07-04

arxiv.org/abs/hep-ph/9607234v2

Phys.Rev. D55 (1997) 411-414

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages. We added the constraint on the hadronic axion window from the life cycle of red-giant and horizontal-branch stars

Scientific paper

10.1103/PhysRevD.55.411

We point out that if the Peccei-Quinn symmetry breaking scale $F_a$ is in a range of the hadronic axion window ($F_a\sim 10^6$GeV), the ee$\gamma\gamma+/\!\!\!\! E_T$ 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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