Some Lifetimes and Branching Ratios for Charmed Hadrons Produced in the Fermilab Wide-Band Photon Beam

Preliminary values are presented for lifetimes of the $Λ_{c}^{+}$ decaying into $pK^⁻π^+$ and $D_{8}^+$ decaying into Φπ. Also presented are preliminary results on samples of $D^0→\overline{K^0}K^+K^⁻$, including $D^0→\overline{K^0}Φ$, and $D^0→\overline{K^0}π^+π^⁻$ decays. The data are from the first run of Fermilab experiment E687 using the Fermilab Wide-Band Photon Spectrometer. Our lifetime values are (0.20±0.03±0.03) ps for the $Λ_{c}^{+}$ and (0.50±0.06±0.03) ps for the $D_{8}^+$. We find preliminary values for the branching ratios $B(D^0→\overline{K^0}K^+K^⁻)/B(D^0→\overline{K^0}π^+π^⁻)$ and $B(D^0→\overline{K^0}Φ)/B(D^0→\overline{K^0}π^+π^⁻)$ of 0.20 ± 0.06 and 0.16 ± 0.06, respectively; only statistical errors are quoted. Further work is in progress.. Authors: Shephard, W. D. [Univ. of Notre Dame, IN (United States); et al.]. DOE Contract: AC02-07CH11359. Subjects: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS