Mass Degeneracy of the Heavy Mesons in Physical Review 102 No. 1, April 1956, pp. 290-291
Lancaster: The American Physical Society, 1956. 1st Edition. FIRST EDITION IN ORIGINAL WRAPS in which Lee and Yang explain the decay of two K mesons ( + and +) and in doing so discovered that they were identical with the exception of parity (mirror symmetry). Lee and Yang concurrently presented..... More