File talk:Strong force charges.svg

I'm sorry, but what this diagram depicts? It doesn't make any sense to me. I am quite sure gluons with zero charge don't exist.

A classic reference for this diagram is the textbook by Georgi. [[1]] See pages 100 and 101. Cjean42 (talk) 04:35, 15 January 2013 (UTC)[reply]

Thanks, but I'm not asking where this diagram comes from. What this diagram depicts? — Preceding unsigned comment added by 85.71.196.161 (talk) 18:42, 26 January 2013 (UTC)[reply]