Double bottom rule (lemmy.blahaj.zone)
A diagram of a "bottom meson" (composed of an unknown quark "q" and an antibottom quark) with an arrow labeled ":3" pointing to a "double bottom Baryon" (composed of an unknown quark "q" and 2 bottom quarks)....
![](https://incremental.social/media/cache/resolve/entry_thumb/78/fb/78fbe33a72042c9616645ba8da31a56a46ec3dc0de3d48439e5dda3aafe76b62.png)