I present preliminary results on the search for hc in its ηcγ and J/ψπ0 decay modes. We observe an excess of \eta_c\gammaeventsnear3526MeVthathasaprobability{\cal P} \sim 0.001toarisefrombackgroundfluctations.TheresonanceparametersareM=3525.8 \pm 0.2 \pm 0.2 MeV,\Gamma\leq1MeV,and10.6\pm 3.7\pm3.4(br) < \Gamma_{\bar{p}p}B_{\eta_c\gamma} < 12.8\pm 4.8\pm4.5(br) eV.WefindnoeventexcesswithinthesearchregionintheJ/\psi\pi^0$ mode.
@article{arxiv.hep-ex/0410085,
title = {E835 at FNAL: Charmonium Spectroscopy in $\bar p p$ Annihilations},
author = {Claudia Patrignani},
journal= {arXiv preprint arXiv:hep-ex/0410085},
year = {2009}
}
Comments
Presented at the 6th International Conference on Hyperons, Charm and Beauty Hadrons (BEACH 2004), Chicago(Il), June 27-July 3,2004