On the Measurement of the Antineutron Mass

  • Tullio Bressani
  • Bruno Minetti
Part of the Ettore Majorana International Science Series book series (EMISS, volume 17)


Among the various proposals accepted at the LEAR machine, one of them deals with the antineutron (n̄) production and with the related n̄ physics1. There are scarce experimental data on this subject and even the n̄ mass (M) was not yet directly measured, due to the lack of suitable beams. We have then studied how to perform a measurement of M with a precision of some 10–6 with a dedicated apparatus by means of a kinematical reconstruction of the charge-exchange reaction:
$$ \overline p + p \to \overline n + n $$
induced by low-energy antiprotons (p̄). We recall that the threshold of the reaction (1) is at 5.103 MeV (98 MeV/c).


Kinematical Reconstruction Multiple Coulomb Scattering Thin Metal Plate Streamer Chamber Expect Counting Rate 
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Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • Tullio Bressani
    • 1
    • 2
  • Bruno Minetti
    • 2
    • 3
  1. 1.Istituto di Fisica dell’UniversitàCagliariItaly
  2. 2.I.N.F.N., Sezione di TorinoItaly
  3. 3.Istituto di Fisica Sperimentale del PolitecnicoTorinoItaly

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