Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
AMA | October 2024
Sean Carroll
There are good reasons not to have multiple spin two particles. And so the five he's referring to is the five possible spin projections of a spin two graviton. Plus two, one, zero, minus one, minus two. Now, I don't know the origin of the statement that there can be only one spin zero. I don't even think that's true.
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