PION MASS MEASUREMENTS USING NEUTRON TIME-OF-FLIGHT TECHNIQUES

Using neutron time-of-flight techniques, the pi /sup -/ mass was determined to be 272.4 plus or minus 1.1 and the mass difference of pi /sup -/ and pi /sup 0/ to be 8.991 plus or minus 0.020 m/sub e/. These values agree favorably with determinations by other groups. (C.J.G.)