Observation Of D+->Eta E(+)Nu(E)

PHYSICAL REVIEW LETTERS(2009)

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摘要
Using a 281 pb(-1) data sample collected at the psi(3770) resonance with the CLEO-c detector at the Cornell Electron Storage Ring, we report the first observation of D+->eta e(+)nu(e). We also set upper limits for D+->eta(')e(+)nu(e) and D+->phi e(+)nu(e) that are about 2 orders of magnitude more restrictive than those obtained by previous experiments.
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