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## Main Question or Discussion Point

Is weak interaction invaraint under CPT Symmetry? Why?

- Thread starter Love*Physics
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Is weak interaction invaraint under CPT Symmetry? Why?

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blechman

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would you please expline further? How can I prove that?

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Haelfix

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There are various books that treat it in varying degrees of rigor. I think Weinberg proves it in his volumes, and for a more mathematical treatment see Streeter/Wightman.

Incidentally people look for violation of the CPT experimentally, so far without success. But it would be a big deal if one day such a fundamental symmetry was broken. It would mean probably that we would need to go back to Constructive field theories for insight.

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