SEARCH FOR NARROW ISOVECTOR DIBARYONS CLOSE TO LOW MASSES THRESHOLD

B. Tatischeff (1) , P. Courtat (1) , Y. Le Bornec (1) , E. Loireleux (1) , F. Reide (1) , N. Willis (1) , O. Bing (2) , F. Hibou (2) , M. Boivin , A. Moalem , M.P. Comets (1) , A.M. Bergdolt (2)

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 IReS - Institut de Recherches Subatomiques

For masses larger than 2 MN + Mπ, narrow peaks in two proton invariant (missing) masses spectra : Mpp (Mx) are now well established. The existence of such narrow peaks is not so unquestionable below 2 MN + Mπ. Tensor analyzing power T20 of the invariant mass Mpp has been studied using the p ([MATH], pp) reaction. Depending on the assumption done for background substraction -a hole or an oscillation may appear at Mpp = 1941 MeV. Additional data are under analysis and will improve the statistics.

Domaines: Articles anciens; Physique des Hautes Energies - Expérience [hep-ex]

B. Tatischeff, P. Courtat, Y. Le Bornec, E. Loireleux, F. Reide, et al.. SEARCH FOR NARROW ISOVECTOR DIBARYONS CLOSE TO LOW MASSES THRESHOLD. International Conference on Polarization Phenomena in Nuclear Physics, 1990, Paris, France. pp.C1-371-C1-374, ⟨10.1051/jphyscol:1990631⟩. ⟨jpa-00230898⟩