Abstract
In an experiment at Fermilab we have measured the lifetime of mesons produced by 800-GeV/c protons on tungsten. → decays from 100 to 350 GeV/c, between 9.3 and 25.3 m from production, were selected for the measurement. The result was (0.8920±0.0044)× sec, in excellent agreement with measurements performed for 2–5-GeV/c . The lifetime was also calculated for seven momentum bins. The results were completely consistent with Lorentz invariance. No evidence was found for the mometnum dependence suggested by the intermediate-range ‘‘fifth-force’’ hypothesis.
- Received 13 February 1987
DOI:https://doi.org/10.1103/PhysRevLett.59.18
©1987 American Physical Society