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Incoming links: Yang Chen-Ning
Tsung-Dao Lee Created 2026-10-18 Updated 2026-11-05
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.[ref]
A physicist.[ref]
https://www.nobelprize.org/prizes/physics/1957/lee/biographical/. Independent professional profile
Portrait of Tsung-Dao Lee
. user:smartneddy. CC BY-SA 2.5, via Wikimedia Commons. Source.
Yang Chen-Ning Created 2026-10-24 Updated 2026-11-05
Yang Chen-Ning and Tsung-Dao Lee questioned whether parity conservation had actually been tested in the weak interaction. Their 1956 paper separates established evidence from an assumed symmetry and proposes concrete tests in nuclear and particle decays. An angular correlation that changes sign under spatial reflection can distinguish a process from its mirror image.[ref]
Question of Parity Conservation in Weak Interactions by Tsung-Dao Lee and Chen Ning Yang. 1956, evidence review and proposed parity tests
A physicist.[ref]
https://www.nobelprize.org/prizes/physics/1957/yang/biographical/. Independent professional profile
Portrait of Yang Chen-Ning
. Academia Sinica (中央研究院); 30 March 2007. Academia Sinica attribution permission; Government Website Open Information Announcement, via Wikimedia Commons. Source.
