AMA | October 2024

12148.018 - 12168.615 Sean Carroll

Mehran Mizrahi says, in a prior episode you mentioned in relation to spin that those are the only options that we've seen. We can imagine others. We've never found a fundamental particle with any spin other than that. Nima Arkani-Hamed in his Cornell lectures in 2007 made a much stronger statement that quantum field theory constrains the possible menu to only these five values.