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In particle physics, helicity is the projection of the angular momentum onto the direction of momentum. For massless spin-1⁄2 particles, helicity is equivalent to the chirality operator multiplied by $\hbar/2$, so may be used for related chirality questions as well.

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How can we measure chirality in experiments?

I understand that we can measure helicity, but how can we determine chirality for massive particles? … Some thoughts: Helicity is the projection of spin in the direction of momentum $h= \frac{ \hat p \hat s}{p}$. …
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