Measurement of D0-D0bar mixing in D0->Ks pi+ pi- decays

Details Measurement of D0-D0bar mixing in D0->Ks pi+ pi- decays Measurement of D0-D0bar mixing in D0->Ks pi+ pi- decays

Publishing date

2007-04-07

URL

arxiv.org/abs/0704.1000v2

Journals

Phys.Rev.Lett.99:131803,2007

Science

Physics

Field

High Energy Physics

SubField

High Energy Physics - Experiment

Additional info

6 pages, 4 figures, Submitted to Physical Review Letters

Type

Scientific paper

Digital Object Identifier

10.1103/PhysRevLett.99.131803

Abstract

We report a measurement of D0-D0bar mixing in D0->Ks pi+ pi- decays using a time-dependent Dalitz plot analysis. We first assume CP conservation and subsequently allow for CP violation. The results are based on 540 fb$^{-1}$ of data accumulated with the Belle detector at the KEKB $e^+e^-$ collider. Assuming negligible CP violation, we measure the mixing parameters $x=(0.80\pm0.29^{+0.09 +0.10}_{-0.07 -0.14})%$ and $y=(0.33\pm0.24^{+0.08 +0.06}_{-0.12 -0.08})%$, where the errors are statistical, experimental systematic, and systematic due to the Dalitz decay model, respectively. Allowing for CP violation, we obtain the $CPV$ parameters $|q/p|=0.86^{+0.30 +0.06}_{-0.29 -0.03}\pm0.08$ and $\arg(q/p)=(-14^{+16 +5 +2}_{-18 -3 -4})^\circ$.

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