Observation of the eta_c(2S) in exclusive B-->K KsK-pi+ decays

Details Observation of the eta_c(2S) in exclusive B-->K KsK-pi+ decays Observation of the eta_c(2S) in exclusive B-->K KsK-pi+ decays

2002-05-31

arxiv.org/abs/hep-ex/0206002v1

Phys.Rev.Lett.89:102001,2002; Erratum-ibid.89:129901,2002

Physics

High Energy Physics

High Energy Physics - Experiment

10 pages, 3 figures, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.89.102001

We report the observation of a narrow peak in the KsK-pi+ invariant mass distribution in a sample of exclusive B-->K KsK-pi+ decays collected with the Belle detector at the KEKB asymmetric energy e+e- collider. The measured mass of the peak is M=3654+-6(stat)+-8(syst) MeV/c^2 and we place a 90% confidence level upper limit on the width of Gamma<55 MeV/c^2. The properties agree with heavy-quark potential model expectations for the eta_c(2S), the n=2 singlet S charmonium state.

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