P-wave dibaryon resonances in pp elastic scattering and near-threshold pion production: https://arxiv.org/abs/2012.09886
O.A. Rubtsova, V.I. Kukulin, M.N. Platonova
It is demonstrated within the dibaryon-induced model for NN interaction that pp scattering in P waves is governed mainly by the production of the intermediate dibaryon resonances. Two dibaryon resonances with a mass of about 2200 MeV discovered recently by the ANKE-COSY Collaboration are shown to determine both elastic pp phase shifts and inelasticities in the 3P0 and 3P2-3F2 channels from zero energy up to Tp=0.7-0.9 GeV. It is also demonstrated clearly that the 3P0 dibaryon plays a decisive role in near-threshold neutral pion production in pp collisions which is poorly understood to date. The missing dibaryon contribution is found to be the very possible reason for the failure of traditional approaches to explain near-threshold π0 production.
Comments: 12 pages, 11 figures; version accepted for publication in PRD
