The Search and Study of the Baryonic Resonances with the Strangeness S = +1 in the System of nK+ from the Reaction np -> npK+K- at the Momentum of Incident Neutrons Pn = (5.20+/-0.12)GeV/c

TL;DR

This study investigates baryonic resonances with strangeness S=+1 in the nK+ system produced in np collisions at 5.20 GeV/c, revealing significant resonances and constructing a rotational band linking their masses and spins.

Contribution

It provides new experimental evidence of S=+1 baryonic resonances in np interactions and establishes a rotational band pattern relating their masses and spins.

Findings

Identification of resonances with large statistical significance

Resonance widths comparable to mass resolution

Construction of a rotational band linking resonance masses and spins

Abstract

The production and properties of the resonances with the strangeness S = +1 in the system of nK+ were studied in the reaction np -> npK+K- at the momentum of incident neutrons Pn = (5.20+/-0.12)GeV/c. A number of peculiarities was found in the effective mass spectrum of the mentioned above system. All these resonances have a large statistical significance. 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.