First results concerning p-pBAR and n-pBAR annihilation cross section and n-pBAR total cross sections at low energies (2.25 less-than-or-equal-to E(pBAR) less-than-or-equal-to 2.76 MeV and 3.4 < E(nBAR) < 44.6 MeV) obtained by the OBELIX spectrometer are reported. The agreement with the few existing data in this energy range is good; the comparison with some models gives interesting indications on the S and P wave contribution at very low energy and on the range of the elastic interaction.
Antinucleon-nucleon Annihilation Cross-section Measurements At Low Energies
BALESTRA, Ferruccio;BONAZZOLA, Giancarlo;BRESSANI, Tullio;BUSSA, Maria Pia;BUSSO, Luigi;COSTA, Sergio;FERRERO, Livio;GARFAGNINI, Raffaello;GRASSO, Antonino;MARCELLO, Simonetta;PANZIERI, Daniele;PIRAGINO, Guido;ZOSI, Gianfranco
1993-01-01
Abstract
First results concerning p-pBAR and n-pBAR annihilation cross section and n-pBAR total cross sections at low energies (2.25 less-than-or-equal-to E(pBAR) less-than-or-equal-to 2.76 MeV and 3.4 < E(nBAR) < 44.6 MeV) obtained by the OBELIX spectrometer are reported. The agreement with the few existing data in this energy range is good; the comparison with some models gives interesting indications on the S and P wave contribution at very low energy and on the range of the elastic interaction.
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