Abstract
Serious difficulties from extinction are shown to exist in the interpretation of past experiments on rays from moving sources. We have measured the relative speed of the two rays emitted forward and backward by a meson decaying in flight. The velocity of the neutral pions, which were produced in the reaction , was . We have compared our results with what would have been expected, taking account of extinction, on the assumption that the initial photon velocities were and . The results were in complete disagreement with this assumption.
- Received 17 July 1963
DOI:https://doi.org/10.1103/PhysRev.135.B1071
©1964 American Physical Society