CMS uncovers the elusive pumpkin particle

The CMS experiment has seen evidence of one of the rarest interactions in particle physics: the pumpkin-flavor phenomenon pictured above. In most cases of the illustrated interaction, two pairs of pumpkin particles are released: a jack-o-lantern with a Cinderella squash and two common round varieties. In even rarer instances, the interacting particles may decay into delicious pies. Image: Grim Pivarski, Scare-ah Witman