Abstract
Studies in which BABAR data have shown evidence for mixing in the neutral charm meson system are presented. A new measurement of the lifetime difference parameter yCP = (1.16±0.22±0.18)% is described. Results are also presented from a systematic study of DK and D*K invariant mass distributions from a 470 fb−1 sample of asymmetric e+e− interactions recorded by the BABAR detector at the PEP-II storage rings. A new charmed-strange meson has been observed with mass [3044±8stat(−5+30)syst] MeV/c2 and width [239±35stat(+46−42)syst]MeV/c2.
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