1. T D Lee and C N Yang, Question of Parity Conservation inWeak Interactions, Phys. Rev., Vol.104, 254, 1956.
2. C S Wu, E Ambler, R W Hayward, D D Hoppes and R P Hudson, Phys. Rev., Vol.105, 1413, 1957.
3. At just about the same time as the Wu et al. experiment, the conceptually simpler experiment using the decay Λ → p + π
− was done by Garwin, Lederman and Weinrich at Columbia University, and independently by Telegdi and Friedman at the University of Chicago. The result of the former appeared in the same issue of the Physical Review as [2], while publication of the latter in the same journal seems to have been delayed because of a ‘Columbia effect’.
4. E Fermi, La Ricerca Scientifica, 4, No.2, 491, 1933; Attempt at a theory of β-rays, Il Nuovo Cimento, 11, 1 1934; Zeitschrift für Physik 88, 161, 1934.
5. G Gamow and E Teller, Selection Rules for the β-disintegration, Phys. Rev., 49, 895, 1936.