It’s very nice to discover humor in a paper that I thought I knew all too well. Above is a a Feynman diagram taken from said paper. Although not as cute as a penguin, it might compete with other dog renditions in popular culture.
You sparked memory of Penguin and related article.
For some time, it was not clear to me how to get the word into this b quark paper that we were writing at the time…. Later…I had a sudden flash that the famous diagrams look like penguins. So we put the name into our paper, and the rest, as they say, is history.”BaBar’s window on the weak force
So it looks like we can add a few more images to the list, while looking to Lubo’s link. Genus figure, appear to look like a dog bone with holes in the end?:)