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Currently, I am reading the book "Lectures on Quantum Field Theory" (byAshok Das)

But I am a bit confusing.Why does Dirac Equation describe spin 1/2 particles?

I have already known that Dirac Equation bears some angular momentum structure, but why it just describe spin 1/2 not others?

Thanks for answering.

Best wishes.

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# Why does Dirac Equation describe spin 1/2 particles?

**Physics Forums | Science Articles, Homework Help, Discussion**