ar X iv : h ep - p h / 95 09 38 8 v 1 2 6 Se p 19 95 ASPECTS OF CHARMONIUM

Here we discuss three separate topics of charmonium. (1) The Omicron O as 1 −− trigluonia, and the charmonium puzzle; the η ′ c (3600) search. (2) The decay ψ(1 P 1) → π o + J/ψ and isospin violating charmonium decays. (3) How to search for χ ′ c = χc(2P) charmonium states. Introduction I wish to thank the Chair of the Organizing Committee of Hadron '95, Sandy Donnachie, for choosing for me the topic of my talk on Aspects of Charmo-nium. Such an umbrella choice enables me to cover three disparate topics in which I have done work in association with others over the past couple of years. The common denominator being that at least the word " charmonium " (as well as, by and large the content), figures prominently in all three topics. Sections 1, 2, and 3 below study these topics with conclusions/summaries attached to each separately. So here we go!