Timeline for Why must a fundamental particle's spin be a multiple of $\frac 1 2$? [duplicate]
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| Jun 21, 2017 at 2:25 | vote | accept | florence | ||
| Jun 21, 2017 at 1:43 | answer | added | Gold | timeline score: 1 | |
| Jun 20, 2017 at 22:55 | history | closed | Qmechanic♦ quantum-mechanics Users with the quantum-mechanics badge or a synonym can single-handedly close quantum-mechanics questions as duplicates and reopen them as needed. | Duplicate of Why does spin have a discrete spectrum? | |
| Jun 20, 2017 at 22:34 | comment | added | Cosmas Zachos | pp144-146 of said classic. | |
| Jun 20, 2017 at 22:15 | comment | added | Cosmas Zachos | So the unitary reps of SU(2) must have spin integer or half integer. (Dirac's QM book has a peerless derivation, if other books frustrated you.) How do you expect to consider 2/3? | |
| Jun 20, 2017 at 22:14 | comment | added | Deschele Schilder | @florence-The $\Delta$, ${\Sigma}^*$, or ${\Omega}^-$ (all baryons), for example, are well-known particles with spin $\frac 3 2$. So particles with spin $\frac 3 2$ áre discovered. | |
| Jun 20, 2017 at 21:47 | comment | added | florence | @CosmasZachos I understand just about everything in that Wikipedia article and I also know the basics of representation theory. | |
| Jun 20, 2017 at 21:42 | history | edited | Qmechanic♦ |
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| Jun 20, 2017 at 21:36 | comment | added | Cosmas Zachos | Have you studied the representation theory of SU(2) and ladder operators for the spin ? | |
| Jun 20, 2017 at 21:36 | comment | added | Qmechanic♦ | Possible duplicates: physics.stackexchange.com/q/174018/2451 , physics.stackexchange.com/q/29655/2451 , physics.stackexchange.com/q/22806/2451 and links therein. | |
| Jun 20, 2017 at 21:33 | history | edited | Qmechanic♦ |
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| Jun 20, 2017 at 21:22 | history | asked | florence | CC BY-SA 3.0 |