Paper detail

The Search and Study of Low-mass Scalar Mesons in the Reaction $np --> npπ^+π^-$ at Pn=3.83 Gev/c

This work is devoted to search and study scalar $σ_0 0^+[0^++]$ - mesons in the system of $π^+π^-$ from the reaction $np -> npπ^+π^-$ at the impulse of the quasimonochromatic neutrons c from the data obtained in an exposure of the 1m H2 bubble chamber of LHE (JINR)The resonance with and has been found out in effective mass distribution. Value of a statistical deviation of this peculiarity from a background is more than four. Spin of the resonance has been estimated, which, with high probability, is equal 0. The other quantum numbers of the resonance have been estimated.