3 ms·
"...bootstrappers find that many different spin-0 particles are possible." Is that a typo, or is it really possible to have spin -0?
by jejones3141 7y ago
"...bootstrappers find that many different spin-0 particles are possible."
Is that a typo, or is it really possible to have spin -0?
- danbruc 7y agoNo typo, spin 0 is a thing.
- ketralnis 7y agoIt's a hyphen, not a minus sign
- Accujack 7y agoMaybe for small values of 0? ;)
- yummypaint 7y agoAn example is a helium nucleus in the ground state
- yters 7y agoI think with some equations there is a discontinuity at zero, like tan, but it still makes sense to talk about what happens asymptotically approaching zero and then it matters from which side you approach zero, hence positive and negative zero.
- mjcohen 7y agotan does not have a discontinuity at zero. |x|/x does, as does 1/x. tan's is at pi/2 in particular and (n+1/2)pi in general.
- duelingjello 7y agoAlthough tan has a set of discontinuities when it jumps between +∞ and -∞ through complex infinity (∞~). tan(π(x + 0.5)) = ∞~, x ∃ ℤ (π on my screen doesn't look much like greek pi.)