Journal article

Measurement of yCP in D0 meson decays to the KS0K+K- final state

Zupanc, A.; Adachi, I.; Aihara, H.; Arinstein, K.; Aulchenko, V.; Aushev, T.; Bakich, A.; Balagura, V.; Barberio, E.; Bay, A.

We present a measurement of the D-0 - (D) over bar (0) mixing parameter y(CP) using a flavor-untagged sample of D-0 -> (KSK+K-)-K-0 decays. The measurement is based on a 673 fb(-1) data sample recorded with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Using a method based on measuring the mean decay time for different K+K- invariant mass intervals, we find y(CP) = (+0.11 +/- 0.61(stat.) +/- 0.52(syst.))%.


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