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VOLUME 61 (1995) | ISSUE 11 | PAGE 865
Measurement of the lifetimes of π+ and K+ mesons
Precise measurements of the lifetimes of 77+ and K+ mesons have been carried out. The new measurement method makes use of a periodic temporal microstructure of a beam of protons which are interacting with the target. Positive muons from the decay of тг+ and K+ mesons produced and stopped in the target are detected. The values found are τπ+ = 26.0361 ±0.0052 ns and rK+ = 12.415±0.024 ns. © 1995