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p̄p Annihilation Cross Sections at Very Low Energy

  • A. Bertin
  • , M. Bruschi
  • , M. Capponi
  • , B. Cereda
  • , S. De Castro
  • , A. Ferretti
  • , D. Galli
  • , B. Giacobbe
  • , U. Marconi
  • , M. Piccinini
  • , N. Semprini-Cesari
  • , R. Spighi
  • , S. Vecchi
  • , A. Vezzani
  • , F. Vigotti
  • , M. Villa
  • , A. Vitale
  • , A. Zoccoli
  • , G. Belli
  • , M. Corradini
  • A. Donzella, E. Lodi-Rizzini, L. Venturelli, A. Zenoni, C. Cicalò, A. Masoni, G. Puddu, S. Serci, P. Temnikov, G. Usai, V. G. Ableev, O. Yu Denisov, O. E. Gorchakov, S. N. Prakhov, A. M. Rozhdestvensky, M. G. Sapozhnikov, V. I. Tretyak, M. Poli, P. Gianotti, C. Guaraldo, A. Lanaro, V. Lucherini, F. Nichitiu, C. Petrascu, A. Rosca, C. Cavion, U. Gastaldi, M. Lombardi, L. Vannucci, G. Vedovato, A. Andrighetto, M. Morando, R. A. Ricci, G. Bendiscioli, V. Filippini, A. Fontana, P. Montagna, A. Rotondi, A. Saino, P. Salvini, A. Filippi, F. Balestra, E. Botta, T. Bressani, M. P. Busso, L. Busso, D. Calvo, P. Cerello, S. Costa, F. D'Isep, L. Fava, A. Feliciello, L. Ferrero, R. Garfagnini, A. Grasso, A. Maggiora, S. Marcello, N. Mirfakhraee, D. Panzieri, D. Parena, E. Rossetto, F. Tosello, G. Zosi, M. Agnello, F. Iazzi, B. Minetti, G. Pauli, S. Tessaro, L. Santi

Research output: Contribution to journalArticlepeer-review

Abstract

The p̄p total annihilation cross section has been measured, with the OBELIX apparatus at LEAR, at ten values of the antiproton incident momentum between 43 and 175 MeV/c. The values of the cross section show that the well-known 1/p behavior of the annihilation cross section is drastically modified at very low momenta, which demonstrates the important role of Coulomb forces in low-energy p̄p interaction. Moreover, they do not present any explicit resonant behavior. Around 50 MeV/c, a preliminary value of the cross section for the KSKL channel is obtained too. * This article was submitted by the authors in English.

Original languageEnglish
Pages (from-to)1371-1376
Number of pages6
JournalPhysics of Atomic Nuclei
Volume59
Issue number8
Publication statusPublished - Aug 1996
Externally publishedYes

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