I Beta decay and CPT symmetry

entropy1

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I read that CP-symmetry violation occurs (or can occur) in beta decay. Does that mean that, since CPT-symmetry must hold, there is no T-symmetry?
 

Paul Colby

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yes, within LQFT which appears to be our most complete theory.
 

vanhees71

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One should note that the violation of P, CP, and T symmetry are all shown directly by observation, most recently the T violation in B decays by the BABAR collaboration. I'm to lazy to google for it. The usual kind of relativistic QT, i.e., local relativistic QFT with a stable ground state, predicts CPT invariance, which so far has not been observerd to be violated.
 

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