E835 at FNAL: Charmonium Spectroscopy in p¯p Annihilations

I present preliminary results on the search for hc in its ηcγ and J/ψπ0 decay modes. We observe an excess of ηcγ events near 3526 MeV that has a probability P∼0.001 to arise from background fluctations. The resonance parameters are M=3525.8±0.2±0.2MeV, Γ⩽1MeV, and 10.6±3.7±3.4(br)<Γp¯pBηcγ<12.8±4.8±4.5(br)eV. We find no event excess within the search region in the J/ψπ0 mode.