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Published October 26, 1970 | Published
Journal Article Open

Measurement of the ΔS=-ΔQ Amplitude from K_(e3)^0 Decay


We have measured the time distribution of the π^+e^-ν and π^-e^+ν modes from initial K^0's in a spark-chamber experiment performed at the Bevatron. From 1079 events between 0.2 and 7 K_S^0 lifetime, we find ReX=-0.069±0.036, ImX=+0.108_(-0.074)^(+0.092). This result is consistent with X=0 (relative probability = 0.25), but more than 4 standard deviations from the existing world average, +0.14 -0.13i.

Additional Information

© 1970 The American Physical Society. Received 19 June 1970; published in the issue dated 26 October 1970. Work supported in part by the U. S. Atomic Energy Commission. Prepared under Contract No. AT(11-1)-68 for the San Francisco Operations Office, U. S. Atomic Energy Commission. Work supported in part by National University of Ireland Traveling Studentship.

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