2.22 GeV ηη′ structure observed in 38 GeV / c and 100 GeV / c π-p collisions

D. Alde,Freddy Binon,Charles Bricman,Sergey Donskov,J. Dufournaud,M. Gouanere,Alexandre A.V. Inyakin,Vasilij V.A. Kachanov,D.B. Kakauridze,G.V. Khaustov,Edward E.A. Knapp,Alexei A.V. Kulik,Jean-Pierre Lagnaux,A.A. Lednev,Yu.V. Mikhailov,T. Mouthuy,V. Obraztsov,Jean Pierre Peigneux,A. Possoz,Yu.D. Prokoshkin,Yu Y.V. Rodnov,Sergey S.A. Sadovsky,Vladimir D. Samoylenko,Petr P.M. Shagin,D. Sillou,Alexandre A.V. Singovsky,Jean-Pierre Stroot,Valentine Sugonyaev

2.22 GeV ηη′ structure observed in 38 GeV / c and 100 GeV / c π-p collisions

1986

Abstract A structure has been observed at 2220 MeV in the mass spectrum of ηη ′ systems produced by 38GeV/ c and 100 GeV/ c ′ negative pions on protons. The angular distribution of the decay products shows that this structure is presumably a spin J ⩾ 2 meson.

Keywords:

Mass spectrum
Meson
Particle physics
Pion
Nuclear physics
Spin-½
Proton
Physics
angular distribution

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