What is exactly central production?

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I am told that glueball has a distincitve feature that is enhanced production in gluon-rich channels such as central production and radiative J/\psi decay.

Could someone break these up a little for me?

What is central production? How radiative J/\psi decay is a gluon-rich channel?

THanks.
 
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Central production means that the decay products appear in the central detector, away from the beam pipe. Can you explain the set-up (ie. the experiment) so that I can see why this would be the case for glueball production?
 

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