Observation of the h_c(1P) using e^+e^- collisions above DDbar threshold
High Energy Physics - Experiment
2011-09-01 v2
Abstract
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.
Keywords
Cite
@article{arxiv.1104.2025,
title = {Observation of the h_c(1P) using e^+e^- collisions above DDbar threshold},
author = {CLEO Collaboration and T. K. Pedlar and D. Cronin-Hennessy and J. Hietala and S. Dobbs and Z. Metreveli and K. K. Seth and A. Tomaradze and T. Xiao and L. Martin and A. Powell and G. Wilkinson and H. Mendez and J. Y. Ge and D. H. Miller and I. P. J. Shipsey and B. Xin and G. S. Adams and D. Hu and B. Moziak and J. Napolitano and K. M. Ecklund and J. Insler and H. Muramatsu and C. S. Park and L. J. Pearson and E. H. Thorndike and S. Ricciardi and C. Thomas and M. Artuso and S. Blusk and R. Mountain and T. Skwarnicki and S. Stone and L. M. Zhang and G. Bonvicini and D. Cinabro and A. Lincoln and M. J. Smith and P. Zhou and J. Zhu and P. Naik and J. Rademacker and D. M. Asner and K. W. Edwards and K. Randrianarivony and G. Tatishvili and R. A. Briere and H. Vogel and P. U. E. Onyisi and J. L. Rosner and J. P. Alexander and D. G. Cassel and S. Das and R. Ehrlich and L. Gibbons and S. W. Gray and D. L. Hartill and B. K. Heltsley and D. L. Kreinick and V. E. Kuznetsov and J. R. Patterson and D. Peterson and D. Riley and A. Ryd and A. J. Sadoff and X. Shi and W. M. Sun and J. Yelton and P. Rubin and N. Lowrey and S. Mehrabyan and M. Selen and J. Wiss and J. Libby and M. Kornicer and R. E. Mitchell and M. R. Shepherd and C. M. Tarbert and D. Besson},
journal= {arXiv preprint arXiv:1104.2025},
year = {2011}
}
Comments
9 pages, 4 figures, as published