Improved constraints on D0 - anti-D0 mixing in D0 ---> K+ pi- decays at BELLE
Collaboration
10 pages
Published in:
- Phys.Rev.Lett. 96 (2006) 151801
e-Print:
- hep-ex/0601029 [hep-ex]
Report number:
- KEK-PRERPINT-2005-92,
- BELLE-PRERPINT-2006-2
Experiments:
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Citations per year
Abstract:
We report the results of a search for D0-D0bar mixing in D0 -> K+ pi- decays based on 400 fb 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<0.72 x 10^{-3} and -9.9 x 10^{-3}- 12.15.Ff
- 11.30.Er
- 13.25.Ft
- D mesons
- meson hadronic decay
- CP invariance
- electroweak theories
- electron positron: colliding beams
- electron positron: annihilation
- D*(2010): electroproduction
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