Nuclear-physics With Obelix

Ableev, A.; Adamo, A.; Andrighetto, A.; Agnello, M.; Balestra, Ferruccio; Belli, G.; Bendiscioli, G.; Bertin, A.; Boccaccio, P.; Bonazzola, Giancarlo; Bressani, Tullio; Bruschi, M.; Bussa, Maria Pia; Busso, Luigi; Calvo, D.; Capponi, M.; Cerello, P.; Cicalo, C.; Corradini, M.; Costa, Sergio; Decastro, S.; Disep, F.; Falomkin, I. V.; Fava, L.; Feliciello, A.; Ferrero, Livio; Filippini, V.; Galli, T. D.; Garfagnini, Raffaello; Gastaldi, U.; Gianotti, P.; Grasso, A.; Guaraldo, C.; Iazzi, F.; Lanaro, A.; Rizzini, E. L.; Lombardi, M.; Lucherini, V.; Maggiora, A.; Marcello, Simonetta; Marconi, U.; Margagliotti, G. V.; Maron, G.; Masoni, A.; Massa, I.; Minetti, B.; Montagna, P.; Morando, M.; Nichitiu, F.; Panzieri, Daniele; Pauli, G.; Piccinini, M.; Piragino, Guido; Poli, M.; Pontecorvo, G. B.; Puddu, G.; Ricci, R. A.; Rossetto, E.; Rotondi, A.; Rozhdestvensky, A. M.; Salvini, P.; Santi, L.; Sapozhnikov, M. G.; Cesari, N. S.; Serci, S.; Spighi, P.; Temnikov, P.; Tessaro, S.; Tosello, F.; Tretyak, V. I.; Usai, G.; Vannucci, L.; Vecchi, S.; Vedovato, G.; Venturelli, L.; Villa, M.; Vitale, A.; Zenoni, A.; Zoccoli, A.; Zosi, Gianfranco

Recent experimental results in antinucleon-nucleus interaction obtained by the OBELIX collaboration at LEAR are presented. Preliminary results concerning the total antineutron-nucleus annihilation cross section at low energy are reported. They represent the first complete set of measurements on medium and heavy nuclei available in the momentum region below 300 MeV/c. A new measurement of the exotic one-meson annihilation at rest pBAR d --> pi- p (Pontecorvo reaction) with the better statistics and precision up to now, is reported. Finally, the measurement of the K+K-/pi+pi- production ratio in pBAR annihilation on gaseous D2 at NTP is presented. From this ratio an upper limit of the P-wave contribution to the ppBAR annihilation in GD2 is inferred.