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Observation of the h<inf>c</inf>(1P) Using e⊃+e⊃- Collisions above the DD̄ Threshold
Date Issued
20-07-2011
Author(s)
Pedlar, T. K.
Cronin-Hennessy, D.
Hietala, J.
Dobbs, S.
Metreveli, Z.
Seth, K. K.
Tomaradze, A.
Xiao, T.
Martin, L.
Powell, A.
Wilkinson, G.
Mendez, H.
Ge, J. Y.
Miller, D. H.
Shipsey, I. P.J.
Xin, B.
Adams, G. S.
Hu, D.
Moziak, B.
Napolitano, J.
Ecklund, K. M.
Insler, J.
Muramatsu, H.
Park, C. S.
Pearson, L. J.
Thorndike, E. H.
Ricciardi, S.
Thomas, C.
Artuso, M.
Blusk, S.
Mountain, R.
Skwarnicki, T.
Stone, S.
Zhang, L. M.
Bonvicini, G.
Cinabro, D.
Lincoln, A.
Smith, M. J.
Zhou, P.
Zhu, J.
Naik, P.
Rademacker, J.
Asner, D. M.
Edwards, K. W.
Randrianarivony, K.
Tatishvili, G.
Briere, R. A.
Vogel, H.
Onyisi, P. U.E.
Rosner, J. L.
Alexander, J. P.
Cassel, D. G.
Das, S.
Ehrlich, R.
Gibbons, L.
Gray, S. W.
Hartill, D. L.
Heltsley, B. K.
Kreinick, D. L.
Kuznetsov, V. E.
Patterson, J. R.
Peterson, D.
Riley, D.
Ryd, A.
Sadoff, A. J.
Shi, X.
Sun, W. M.
Yelton, J.
Rubin, P.
Lowrey, N.
Mehrabyan, S.
Selen, M.
Wiss, J.
Indian Institute of Technology, Madras
Kornicer, M.
Mitchell, R. E.
Shepherd, M. R.
Tarbert, C. M.
Besson, D.
Abstract
Using 586pb⊃-1 of e⊃+e⊃- collision data at E c.m.=4170MeV, produced at the Cornell Electron Storage Ring collider and collected with the CLEO-c detector, we observe the process e⊃+e⊃-→π⊃+π⊃-hc(1P). We measure its cross section to be 15.6±2.3±1.9±3.0pb, where the third error is due to the external uncertainty on the branching fraction of ψ(2S)→π0hc(1P), which we use for normalization. We also find evidence for e⊃+e⊃-→ηhc(1P) at 4170 MeV at the 3σ level and see hints of a rise in the e⊃+e⊃- →π⊃+π⊃-hc(1P) cross section at 4260 MeV.
Volume
107