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    Just finished reading Hawking and Mlodinow's "The Grand Design" which I got for Christmas (highly recommended, by the way). On page 111, there is a picture which illustrates some of the ways that quarks can combine into baryons and mesons. All of the pictures make sense to me, with the exception of the one for the J/psi. The picture suggests that it is made of two anti-charm quarks of different (anti) colours. But surely it should be made of a charm and an anti-charm of the same colour and anti-colour? Or am I missing something?
 
 
 
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