Observation of the Dalitz decay Ds*+→Ds+e+ e-

D. Cronin-Hennessy, J. Hietala, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, T. Xiao, L. Martin, A. Powell, G. Wilkinson, D. M. Asner, G. Tatishvili, H. Mendez, J. Y. Ge, D. H. Miller, I. P.J. Shipsey, B. Xin, G. S. Adams, D. Hu, B. MoziakJ. Napolitano, K. M. Ecklund, J. Insler, H. Muramatsu, C. S. Park, L. J. Pearson, E. H. Thorndike, S. Ricciardi, C. Thomas, M. Artuso, S. Blusk, R. Mountain, T. Skwarnicki, S. Stone, J. C. Wang, L. M. Zhang, G. Bonvicini, D. Cinabro, A. Lincoln, M. J. Smith, P. Zhou, J. Zhu, P. Naik, J. Rademacker, K. W. Edwards, K. Randrianarivony, R. A. Briere, H. Vogel, P. U.E. Onyisi, J. L. Rosner, J. P. Alexander, D. G. Cassel, S. Das, R. Ehrlich, L. Gibbons, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. L. Kreinick, V. E. Kuznetsov, J. R. Patterson, D. Peterson, D. Riley, A. Ryd, A. J. Sadoff, X. Shi, W. M. Sun, J. Yelton, P. Rubin, N. Lowrey, S. Mehrabyan, M. Selen, J. Wiss, J. Libby, M. Kornicer, R. E. Mitchell, M. R. Shepherd, C. M. Tarbert, D. Besson, T. K. Pedlar

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Abstract

Using 586pb -1 of e +e - collision data acquired at √s=4.170GeV with the CLEO-c detector at the Cornell Electron Storage Ring, we report the first observation of Ds*+→Ds+e +e - with a significance of 5.3σ. The ratio of branching fractions B(Ds*+→Ds+e +e -)/ B(Ds*+→Ds+γ) is measured to be [0.72-0.13+0.15(stat)±0. 10(syst)]%, which is consistent with theoretical expectations.

Original languageEnglish (US)
Article number072005
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume86
Issue number7
DOIs
StatePublished - Oct 10 2012

ASJC Scopus subject areas

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

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    Cronin-Hennessy, D., Hietala, J., Dobbs, S., Metreveli, Z., Seth, K. K., Tomaradze, A., Xiao, T., Martin, L., Powell, A., Wilkinson, G., Asner, D. M., Tatishvili, G., Mendez, H., Ge, J. Y., Miller, D. H., Shipsey, I. P. J., Xin, B., Adams, G. S., Hu, D., ... Pedlar, T. K. (2012). Observation of the Dalitz decay Ds*+→Ds+e+ e- Physical Review D - Particles, Fields, Gravitation and Cosmology, 86(7), [072005]. https://doi.org/10.1103/PhysRevD.86.072005