Observation of $ψ(4415)\to D \bar D{}^{*}_2(2460)$ decay using initial-state radiation

Details Observation of $ψ(4415)\to D \bar D{}^{*}_2(2460)$ decay using initial-state radiation Observation of $ψ(4415)\to D \bar D{}^{*}_2(2460)$ decay using initial-state radiation

2007-08-24

arxiv.org/abs/0708.3313v2

Phys.Rev.Lett.100:062001,2008

Physics

High Energy Physics

High Energy Physics - Experiment

Presented on EPS07, LP07, QWG07conferences

Scientific paper

10.1103/PhysRevLett.100.062001

We report the first observation of the $\psi(4415)$ resonance in the reaction $\e^+e^-\to D^0 D^-\pi^+$ and a measurement of its cross section in the center-of-mass energy range $4.0\mathrm{GeV}$ to $5.0\mathrm{GeV}$ with initial state radiation. From a study of resonant structure in $\psi(4415)$ decay we conclude that the $\psi(4415)\to D^0 D^-\pi^+$ decay is dominated by $\psi(4415)\to D \bar D{}^{*}_2(2460)$. We obtain $\mathcal{B}(\psi(4415)\to D^0 D^-\pi^+_{\mathrm {non-resonant}})/\mathcal{B}(\psi(4415)\to D \bar D{}^{*}_2(2460)\to D^0 D^-\pi^+)<0.22$ at 90% C.L. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 673 $\mathrm{fb}^{-1}$.

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