|
|||||
|
|
Search for D0-D0 mixing in D0 --> K+ pi(-) decays and measurement of the doubly-Cabibbo-suppressed decay rate |
|
| Authors: | Li J Zhang Z P Schwartz A J Abe K Abe K Aihara H Akatsu M Asano Y Aushev T Bakich A M Bay A Bedny I Bitenc U Bizjak I Bondar A Bozek A Bracko M Brodzicka J Browder T E Chao Y Chen A Chen K-F Chen W T Cheon B G Chistov R Choi S-K Choi Y Chuvikov A Cole S Dalseno J Danilov M Dash M Dong L Y Drutskoy A Eidelman S Eiges V Enari Y Fang F Fratina S Gabyshev N Garmash A Gershon T Gokhroo G Haba J Hayasaka K Hayashii H Hazumi M Higuchi T Hokuue T Hoshi H Hou S Hou W-S Iijima T Imoto A Inami K Itoh R Iwasaki M Iwasaki Y Kang J H Kang J S Kataoka S U Katayama N Kawai H Kawasaki T Khan H R Kim J H |
| Affiliation: | University of Science and Technology of China, Hefei. |
| Abstract: | We have searched for mixing in the D(0)-D (0) system by measuring the decay-time distribution of D(0) --> K(+) pi(-) decays. The analysis uses 90 fb(-1) of data collected by the Belle detector at the KEKB e(+) e(-) collider. We fit the decay-time distribution for the mixing parameters x' and y' and also for the parameter R(D), which is the ratio of the rate for the doubly-Cabibbo-suppressed decay D(0)--> K+ pi(-) to that for the Cabibbo-favored decay D(0)--> K-pi(+). We do these fits both assuming CP conservation and allowing for CP violation. We use a frequentist method to obtain a 95% C.L. region in the x'(2) - y' plane. Assuming no mixing, we measure R(D) = (0.381 +/- 0.017(+0.008)(-0.016))%. |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ | |