I know what spin is and how theories determine it for particles. What I don't understand yet, is how people, through experiments and data analysis or whatever, reach to confirm/say that the $X$ particle has spin $s$.

For example: when the Higgs boson was finally discovered, there has been an initial (necessary) period in which everything has to be confirmed. Spin too. I remember that during those months people were more than anything else waiting for the confirmation that the Higgs had spin $0$.

Now I'm asking: how/ what is/are the process/es, in experiments, through which one does determine with experiments the spin of a particle? Is it "simple" some data analysis? How does this work?

Answers I already read, which are however incomplete or unclear

How does one experimentally determine chirality, helicity, spin and angular momentum of a fundamental particle?

Why is the Higgs boson spin 0?

How do you find spin of a particle from experimental data?

What are the ways of finding the spin of a particle

  • $\begingroup$ You separate the beam magnetically for charged particles, and count the spots: Stern-Gerlach type device, as improved by Rabi. For photons you have polarization, which can be separated by nonlinear optical materials, left or right handed circular corresponds nicely to helicity. $\endgroup$ – Peter Diehr Mar 10 '16 at 14:34
  • $\begingroup$ en.wikipedia.org/wiki/Stern-Gerlach_experiment $\endgroup$ – hsnee Mar 14 '16 at 20:51

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