Barionic Resonances with Positive Strangeness S=+1 in the System nK+ from the Reaction np ->npK+K- at the Momentum of Incident Neutrons Pn=5.20 Gev/c

The investigation has been performed at the Veksler and Baldin Laboratory of High Energies, JINR Dubna, 2006. The investigation has been presented at XVIII International Baldin Seminar on High Energy Physics Problems “Relativistic Nuclear Physics and Quantum Chromodynamics” Abstract The production and properties of the resonances with the strangeness S = +1 in the system of nK + were studied in the reaction np (cid:111) npK + K - at the momentum of incident neutrons P n = (5.20 ± 0.12) GeV/c. A number of peculiarities were found in the effective mass spectrum of the mentioned above system. Their widths are comparable with the mass resolution. The estimation of the spins of resonances was carried out and the rotational band connecting the resonances masses and their spins was constructed. quantum numbers of expected new to propose a formula of the rotational band that relates the resonance masses to their spins. The (cid:300) resonance of mass M=1530 MeV/c 2 , width (cid:299) (cid:148) 15 MeV/c 2 , hypercharge Y = 2, isotopic spin I = 0, and spin-parity J P = 1/2 + is on the top of the antidecuplet.