"Playdoyer" for a charmonium spectroscopy at SuperLEAR

We think the construction of a new antiproton storage ring at CERN, with a momentum of circulating particles from 2 up to 7 GeV/c, would lead to an important progress in our understanding of strong interactions. As an example a quantitative charmonium spectroscopy and the search for "exotic" heavy states (c cbar g, cq - cbar qbar, gg) are discussed in the framework of the detection of the e+e- pairs (J/psi or psi' probe)

J/psi pi0 and e+ e- exclusive production in proton-antiproton annihilation

We have measured the non resonant production cross section for the processes p pbar >> J/psi pizero and p pbar >> e+ e- at center of mass energies around 3.5 GeV. We found evidence for a resonance af mass 3525.2 and width <1.1 MeV that we identify with the state hc (1P1) of charmoniu

Proton electromagnetic form factors in the time like region from 8.9 to 13.0 GeV2

Cross sections for the reaction pp→e+e- have been measured at s=8.9, 12.4, and 13.0 GeV2. The cross sections have been analyzed to obtain the proton electromagnetic form factors in the timelike region

Study of the angular distribution of the reaction p pbar -> chi c2 -> J/psi gamma -> e+ e- gamma

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Production of the f2(1520) resonance in antiproton-proton annihilation at sqrt(s)=2980 and 3526 MeV

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A study of the effect of molecular and aerosol conditions in the atmosphere on air fluorescence measurements at the Pierre Auger Observatory

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