11 November 2015 41 7K Report

parity is not conserved in weak interaction, like beta decay. this was discovered exactly 60 years ago and since then a fundamental principle in QFT. the nonconservtion of parity comes from the fact, that massless neutrinos can only have two spin positions, parallel or antiparallel to their propagating direction (like photons). the spin of massive particles may point in any direction. A detailed analysis shows (Bjorken&Drell, rel. quantum mechanics, rel. quantum field theory), QED conserves parity, QAD breakes parity.

resume: massive neutrinos (Noble Price) are on the same scale as "neutrinos faster than light" (CERN)

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