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= T. D. Lee
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<Tsung-Dao Lee> co-developed experimentally testable challenges to <parity> conservation with <Yang Chen-Ning>. In a polarized nuclear decay, the parent <spin> supplies an axial direction while the emitted particle's <momentum> supplies a polar direction. Their scalar product changes sign under <parity>, so a preferred emission direction can expose a symmetry failure. The proposal made a foundational assumption into a laboratory question.<Question of Parity Conservation in Weak Interactions by Tsung-Dao Lee and Chen Ning Yang>[1956, beta-decay test and angular correlations]{ref}

A <physicist>.https://www.nobelprize.org/prizes/physics/1957/lee/biographical/[Independent professional profile]{ref}

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 Tsung-Dao Lee (source code)