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    Observation of a narrow resonance of mass 2.46 GeV/c2 decaying to Ds*+π0 and confirmation of the DsJ*(2317) state

    D. Besson

    S. Anderson, V. V. Frolov, D. T. Gong, Y. Kubota, S. Z. Li, R. Poling, A. Smith, C. J. Stepaniak, and J. Urheim

    Z. Metreveli, K. K. Seth, A. Tomaradze, and P. Zweber

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    T. E. Coan, Y. S. Gao, F. Liu, and R. Stroynowski

    M. Artuso, C. Boulahouache, S. Blusk, E. Dambasuren, O. Dorjkhaidav, R. Mountain, H. Muramatsu, R. Nandakumar, T. Skwarnicki et al.

    A. H. Mahmood

    S. E. Csorna and I. Danko

    G. Bonvicini, D. Cinabro, M. Dubrovin, and S. McGee

    A. Bornheim, E. Lipeles, S. P. Pappas, A. Shapiro, W. M. Sun, and A. J. Weinstein

    R. A. Briere, G. P. Chen, T. Ferguson, G. Tatishvili, H. Vogel, and M. E. Watkins

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    S. B. Athar, P. Avery, L. Breva-Newell, V. Potlia, H. Stoeck, and J. Yelton

    B. I. Eisenstein, G. D. Gollin, I. Karliner, N. Lowrey, C. Plager, C. Sedlack, M. Selen, J. J. Thaler, and J. Williams

    K. W. Edwards

    • University of Kansas, Lawrence, Kansas 66045, USA

    • University of Minnesota, Minneapolis, Minnesota 55455, USA

    • Northwestern University, Evanston, Illinois 60208, USA

    • Ohio State University, Columbus, Ohio 43210, USA

    • University of Oklahoma, Norman, Oklahoma 73019, USA

    • University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA

    • Purdue University, West Lafayette, Indiana 47907, USA

    • University of Rochester, Rochester, New York 14627, USA

    • Southern Methodist University, Dallas, Texas 75275, USA

    S. Stone and J. C. Wang

    • Syracuse University, Syracuse, New York 13244, USA

    • University of Texas–Pan American, Edinburg, Texas 78539, USA

    • Vanderbilt University, Nashville, Tennessee 37235, USA

    • Wayne State University, Detroit, Michigan 48202, USA

    • California Institute of Technology, Pasadena, California 91125, USA

    • Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA

    L. Gibbons, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, L. Hsu, C. D. Jones, J. Kandaswamy, D. L. Kreinick, A. Magerkurth, H. Mahlke-Krüger, T. O. Meyer, N. B. Mistry, J. R. Patterson, D. Peterson, J. Pivarski, S. J. Richichi, D. Riley, A. J. Sadoff, H. Schwarthoff, M. R. Shepherd, J. G. Thayer, D. Urner, T. Wilksen, A. Warburton, and M. Weinberger

    • Cornell University, Ithaca, New York 14853, USA

    • University of Florida, Gainesville, Florida 32611, USA

    • University of Illinois, Urbana-Champaign, Illinois 61801, USA

    • Carleton University, Ottawa, Ontario, Canada K1S 5B6
    • the Institute of Particle Physics, Canada M5S 1A7

    Phys. Rev. D 68, 032002 – Published 28 August, 2003Erratum Phys. Rev. D 75, 119908 (2007)

    DOI: https://doi.org/10.1103/PhysRevD.68.032002

    Abstract

    Using 13.5 fb1 of e+e annihilation data collected with the CLEO II detector, we have observed a narrow resonance decaying to Ds*+π0 with a mass near 2.46GeV/c2. The search for such a state was motivated by the recent discovery by the BaBar Collaboration of a narrow state at 2.32GeV/c2, the DsJ*(2317)+, that decays to Ds+π0. Reconstructing the Ds+π0 and Ds*+π0 final states in CLEO data, we observe peaks in both of the corresponding reconstructed mass difference distributions, ΔM(Dsπ0)=M(Dsπ0)M(Ds) and ΔM(Ds*π0)=M(Ds*π0)M(Ds*), both of them at values near 350MeV/c2. We interpret these peaks as signatures of two distinct states, the DsJ*(2317)+ plus a new state, designated as the DsJ(2463)+. Because of the similar ΔM values, each of these states represents a source of background for the other if photons are lost, ignored or added. A quantitative accounting of these reflections confirms that both states exist. We have measured the mean mass differences ΔM(Dsπ0)=350.0±1.2(stat)±1.0(syst)MeV/c2 for the DsJ*(2317)+ state, and ΔM(Ds*π0)=351.2±1.7(stat)±1.0(syst)MeV/c2 for the new DsJ(2463)+ state. We have also searched, but find no evidence, for decays of the two states via the channels Ds*+γ,Ds+γ, and Ds+π+π. The observations of the two states at 2.32 and 2.46GeV/c2, in the Ds+π0 and Ds*+π0 decay channels, respectively, are consistent with their interpretations as cs¯ mesons with an orbital angular momentum L=1 and spin and parity JP=0+ and 1+.

    Corrections

    6 June, 2007

    Erratum

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