Observation of the h_c(1P) using e^+e^- collisions above DDbar threshold

pi^+ pi^- h_c(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 psi(2S) --> pi^0 h_c(1P), which we use for normalization. We also find evidence for e^+e^- --> eta h_c(1P) at 4170MeV at the 3sigma level, and see hints of a rise in the e^+e^- --> pi^+ pi^- h_c(1P) cross section at 4260MeV.
Comment: 9 pages, 4 figures, as published -->
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevLett.107.041803
Přístupová URL adresa: http://arxiv.org/abs/1104.2025
Přírůstkové číslo: edsarx.1104.2025
Autor: CLEO Collaboration, 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., Libby, J., Kornicer, M., Mitchell, R. E., Shepherd, M. R., Tarbert, C. M., Besson, D.
Rok vydání: 2011
Předmět:
Zdroj: Phys.Rev.Lett.107:041803,2011
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevLett.107.041803
Popis: Using 586pb^-1 of e^+e^- collision data at E_CM = 4170MeV, produced at the CESR collider and collected with the CLEO-c detector, we observe the process e^+e^- --> pi^+ pi^- h_c(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 psi(2S) --> pi^0 h_c(1P), which we use for normalization. We also find evidence for e^+e^- --> eta h_c(1P) at 4170MeV at the 3sigma level, and see hints of a rise in the e^+e^- --> pi^+ pi^- h_c(1P) cross section at 4260MeV.
Comment: 9 pages, 4 figures, as published
Databáze: arXiv
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