Limits on $D^{0} − {\bar{D}}^{0}$ Mixing and $C P$ Violation from the Ratio of Lifetimes for Decay to $K^{-} π^{+}$ , $K^{-} K^{+}$ , and $π^{-} π^{+}$

We present a measurement of

D^{0} − {\bar{D}}^{0}

mixing parameters using the ratios of lifetimes extracted from samples of

D^{0}

mesons decaying to

K^{-} π^{+}

K^{-} K^{+}

, and

π^{-} π^{+}

. Using

91 {f b}^{- 1}

of data collected by the BABAR detector at the PEP-II asymmetric-energy

B

Factory, we obtain a value

Y = [0.8 \pm 0.4 (s t a t .) \binom{+ 0.5}{- 0.4} (s y s t .)] %

, which, in the limit of

C P

conservation, corresponds to the mixing parameter

y = Δ Γ / 2 Γ

. Using the difference in lifetimes of

D^{0}

and

{\bar{D}}^{0}

mesons, we obtain the

C P

-violation parameter

Δ Y = [- 0.8 \pm 0.6 (s t a t .) \pm 0.2 (s y s t .)] %

This publication has 10 references indexed in Scilit:

Limits on D0−D¯0 Mixing and CP Violation from the Ratio of Lifetimes for Decay to K−π+, K−K+, and π−π+