Observation of a narrow resonance of mass [Formula Presented] GeV[Formula Presented] decaying to [Formula Presented] and confirmation of the [Formula Presented] state

D. Besson, S. Anderson, V. V. Frolov, D. T. Gong, Y. Kubota, S. Z. Li, R. Poling, A. Smith, C. J. Stepaniak, J. Urheim, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, K. Arms, E. Eckhart, K. K. Gan, C. Gwon, T. K. Pedlar, E. von ToerneH. Severini, P. Skubic, S. A. Dytman, J. A. Mueller, S. Nam, V. Savinov, J. W. Hinson, G. S. Huang, J. Lee, D. H. Miller, V. Pavlunin, B. Sanghi, E. I. Shibata, I. P.J. Shipsey, D. Cronin-Hennessy, C. S. Park, W. Park, J. B. Thayer, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, C. Boulahouache, S. Blusk, E. Dambasuren, O. Dorjkhaidav, R. Mountain, H. Muramatsu, R. Nandakumar, T. Skwarnicki, S. Stone, J. C. Wang, A. H. Mahmood, S. E. Csorna, I. Danko, G. Bonvicini, D. Cinabro, M. Dubrovin, S. McGee, A. Bornheim, E. Lipeles, S. P. Pappas, A. Shapiro, W. M. Sun, A. J. Weinstein, R. A. Briere, G. P. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, N. E. Adam, J. P. Alexander, K. Berkelman, V. Boisvert, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, R. S. Galik, 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, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, V. Potlia, H. Stoeck, J. Yelton, B. I. Eisenstein, G. D. Gollin, I. Karliner, N. Lowrey, C. Plager, C. Sedlack, M. Selen, J. J. Thaler, J. Williams, K. W. Edwards

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Using 13.5 [Formula Presented] of [Formula Presented] annihilation data collected with the CLEO II detector, we have observed a narrow resonance decaying to [Formula Presented] with a mass near [Formula Presented] The search for such a state was motivated by the recent discovery by the BaBar Collaboration of a narrow state at [Formula Presented] the [Formula Presented] that decays to [Formula Presented] Reconstructing the [Formula Presented] and [Formula Presented] final states in CLEO data, we observe peaks in both of the corresponding reconstructed mass difference distributions, [Formula Presented] and [Formula Presented] both of them at values near [Formula Presented] We interpret these peaks as signatures of two distinct states, the [Formula Presented] plus a new state, designated as the [Formula Presented] Because of the similar [Formula Presented] 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 [Formula Presented] for the [Formula Presented] state, and [Formula Presented] for the new [Formula Presented] state. We have also searched, but find no evidence, for decays of the two states via the channels [Formula Presented] and [Formula Presented] The observations of the two states at 2.32 and [Formula Presented] in the [Formula Presented] and [Formula Presented] decay channels, respectively, are consistent with their interpretations as [Formula Presented] mesons with an orbital angular momentum [Formula Presented] and spin and parity [Formula Presented] and [Formula Presented]

Original languageEnglish (US)
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number3
StatePublished - 2003

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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