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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2009, vol. 80, p. -

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. M., Balagura V., Barberio E., Bay A., Belous K., Bischofberger M., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chang M. C., Chao Y., Chen A., Cheon B. G., Chiang C. C., Cho I. S., Choi Y., Dalseno J., Drutskoy A., Dungel W., Eidelman S., Gabyshev N., Goldenzweig P., Golob B., Ha H., Haba J., Han B. Y., Hara T., Hasegawa Y., Hayasaka K., Hayashii H., Hazumi M., Hoshi Y., Hyun H. J., Inami K., Ishikawa A., Itoh R., Iwasaki M., Joshi N. J., Kah D. H., Kang J. H., Kapusta P., Katayama N., Kawasaki T., Kim H. O., Kim Y. I., Kim Y. J., Kinoshita K., Ko B. R., Korpar S., Križan P., Krokovny P., Kumar R., Kwon Y. J., Kyeong S. H., Lee M. J., Lesiak T., Li J., Liu C., Liu Y., Louvot R., Matyja A., McOnie S., Miyabayashi K., Miyata H., Miyazaki Y., Mizuk R., Nagasaka Y., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nishimura K., Nitoh O., Ogawa S., Ohshima T., Okuno S., Ozaki H., Pakhlov P., Pakhlova G., Park C. W., Park H., Park H. K., Pestotnik R.

We present a measurement of the D0-D̄0 mixing parameter yCP using a flavor-untagged sample of D0→KS0K+K- decays. The measurement is based on a 673fb-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 yCP=(+0.11±0.61(stat.)±0.52(syst.))%. © 2009 The American Physical Society.