Observation of D-0-(D)over-bar(0) Mixing in e(+) e(-) Collisions

We observe D-0-(D) over bar (0) mixing in the decay D-0 -> K+ pi(-) using a data sample of integrated luminosity 976 fb(-1) collected with the Belle detector at the KEKB e(+) e(-) asymmetric-energy collider. We measure the mixing parameters x'(2) = (0.09 +/- 0.22) x 10(-3) and y' = (4.6 +/- 3.4) x 10(-3) and the ratio of doubly Cabibbo-suppressed to Cabibbo-favored decay rates R-D = (3.53 +/- 0.13) x 10(-3) where the uncertainties are statistical and systematic combined. Our measurement excludes the no-mixing hypothesis at the 5.1 standard deviation level.


Published in:
Physical Review Letters, 112, 11, 111801
Year:
2014
Publisher:
College Pk, Amer Physical Soc
ISSN:
0031-9007
Laboratories:




 Record created 2014-05-02, last modified 2018-01-28


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