EXPERIMENTAL TEST OF UNIVERSALITY SIGMA--]NL-NU

In a 540 000-frame stopping-K- exposure at the Brookhaven National Laboratory alternating-gradient synchrotron, the branching ratio Γ(-→nμ-ν)Γ(-→all) is found to be (0.43±0.09)×10-3. Combining this with the world-average -→ne-ν branching ratio of (1.10±0.05)×10-3 gives ΓμΓe=0.39±0.08, which agrees with the universal V-A prediction of 0.45. © 1969 The American Physical Society.