New Result for the Lifetime of theD0Meson

Abstract

In an experiment measuring charmed-particle lifetimes with a hybrid emulsion spectrometer, 1248 neutrino and antineutrino interactions produced by the wide-band beam at Fermi National Accelerator Laboratory have been located. Twenty-one candidates for the decay of neutral charmed particles are found. The lifetime for the $D^0$ based on the sixteen constrained events of this sample is measured to be ${2.3}_{-0.5\mathrm{}}^{+0.8\mathrm{}}$×${10}^{-13\mathrm{}}$ sec.