A new measurement of the ${\Xi }_c^0$ lifetime

Abstract

Using data collected by the Fermilab experiment FOCUS, we measure the lifetime of the charmed baryon (Ξ_{c}^{o}) using the decay channels (Ξ_{c}^{o}\to Ξ^{-}π^{+}) and (Ξ_{c}^{o}\to Ω^{-}K^{+}). From a combined sample of (110\pm 17) events we find (τ(Ξ_{c}^{o}) =~118^{+ 14}_{- 12} \pm5) fs, where the first and second errors are statistical and systematic, respectively.

13 pages, 5 figures