University of David
At the end of 1967, there was a viable model for a unified electroweak theory, but the Infinity Puzzle was not yet solved. Close’s statement on page 142 that “Salam and Weinberg would be invoking hidden symmetry as the panacea for solving the Infinity Puzzle in the case of the weak force” seems careless: perhaps he meant “mass problem” rather than “Infinity Puzzle”. In fact, having examined Salam’s notebooks and having interviewed Weinberg, Close reports that “Salam’s notebooks showed no signs that he made serious efforts, let alone any inroads toward solving the problem [of infinities]. Weinberg also tried and failed.” In particular, Weinberg’s 1967 paper asserts only that “The model may be renormalizable.” In his Nobel lecture, Weinberg attributed his lack of success to the choice of a gauge that made renormalizability “totally obscure” [5, p. 165].