Measurement of theF-Meson Lifetime

Abstract
The lifetime of the F± meson has been measured to be (3.51.8+2.4±0.9) × 1013 s by means of the F±φπ± decay mode. The measurement was made with the High Resolution Spectrometer at the SLAC e+e storage ring PEP at a center-of-mass energy of 29 GeV.