Using 9.0 fb(-1) of integrated luminosity in e(+)e(-) collisions near the Upsilon(4S) mass collected with the CLEO II.V detector we report the first observation of the decay D0-->K(0)(S)etapi(0). We measure the ratio of branching fractions, BR(D0-->K(0)(S)etapi(0))BR / (D0-->K(0)(S)pi(0))=0.46+/-0.07+/-0.06. We perform a Dalitz analysis of 155 selected D0-->K(0)(S)etapi(0) candidates and find leading contributions from a(0)(980)K(0)(S) and K(*)(892)eta intermediate states.
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Article Synopsis
- A Dalitz plot analysis was conducted on decay data from collisions at specific energies, yielding meaningful results.
- An exotic resonant state was identified, showing significant presence with a significance level exceeding three standard deviations.
- The study also provided the first measurement of the branching fraction, detailing uncertainties from statistical, systematic, and external factors.
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