Zhang, LM;
Zhang, ZP;
Li, J;
Abe, K;
Abe, K;
Adachi, I;
Aihara, H;
... Belle Collaboration; + view all
(2006)
Improved constraints on D-0-(D)over-bar(0) mixing in D-0 -> K+ pi(-) decays from the Belle detector.
PHYS REV LETT
, 96
(15)
, Article 151801. 10.1103/PhysRevLett.96.151801.
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Abstract
We report the results of a search for D-0-D-0 mixing in D-0-> K(+)pi(-) decays based on 400 fb(-1) of data accumulated by the Belle detector at KEKB. Both assuming CP conservation and allowing for CP violation, we fit the decay-time distribution for the mixing parameters x(') and y('), as well as for the parameter R-D, the ratio of doubly Cabibbo-suppressed decays to Cabibbo-favored decays. The 95% confidence level region in the (x('2),y(')) plane is obtained using a frequentist method. Assuming CP conservation, we find x('2)< 0.72x10(-3) and -9.9x10(-3)< y(')< 6.8x10(-3) at the 95% confidence level; these are the most stringent constraints on the mixing parameters to date. The no-mixing point (0,0) has a confidence level of 3.9%. Assuming no mixing, we measure R-D=(0.377 +/- 0.008 +/- 0.005)%.
| Type: | Article |
|---|---|
| Title: | Improved constraints on D-0-(D)over-bar(0) mixing in D-0 -> K+ pi(-) decays from the Belle detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.96.151801 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.96.151801 |
| Language: | English |
| Additional information: | © 2006 The American Physical Society |
| Keywords: | SEARCH, D-0 |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1308505 |
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