Observation of the $ψ (4415) \to D {\bar{D}}_{2}^{*} (2460)$ Decay Using Initial-State Radiation

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13 February 2008

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 100 (6) , 062001
https://doi.org/10.1103/physrevlett.100.062001

Abstract

We report measurements of the exclusive cross section for

e^{+} e^{-} \to D^{0} D^{-} π^{+}

over the center-of-mass energy range 4.0 GeV to 5.0 GeV with initial-state radiation and the first observation of the decay

ψ (4415) \to D^{0} D^{-} π^{+}

. From a study of the resonant substructure in

ψ (4415)

decay we conclude that the

ψ (4415) \to D^{0} D^{-} π^{+}

decay is dominated by

ψ (4415) \to D {\bar{D}}_{2}^{*} (2460)

. We obtain

B (ψ (4415) \to D^{0} D^{-} π_{nonresonant}^{+}) / B (ψ (4415) \to D {\bar{D}}_{2}^{*} (2460) \to D^{0} D^{-} π^{+}) < 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 {fb}^{- 1}

.

Keywords

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