2016/09/27 by M. N. Platonova, V. I. Kukulin
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Pion #Production (economics) #Quantum Chromodynamics and Particle Interactions #Resonance (particle physics) #nucl-th
paper · pdf · doi:10.1103/physrevd.94.054039
published as Phys. Rev. D 94, 054039 (2016) · Version accepted for publication in Physical Review D
openalex publication_date 2016/09/27 · openalex created_date 2016/09/30 · arxiv created 2016/10/04 · arxiv updated 2016/10/06 · openalex updated_date 2026/08/05
It is demonstrated that many important features of single-pion production in pp collisions at intermediate energies (Tp\ensuremath≃400--800 MeV) can naturally be explained by supposing excitation of intermediate diproton resonances in pp channels 1D2, 3F3 and 3P2, in addition to conventional mechanisms involving an intermediate \mathrm\ensuremathΔ-isobar. We predict for the first time the crucial role of the 3P2 diproton resonance, found in recent experiments on the single-pion production reaction pp\ensuremath→pp(1S0)\ensuremathπ0, in reproducing the proper behavior of spin-correlation parameters in the reaction pp\ensuremath→d\ensuremathπ+ which were poorly described by conventional meson-exchange models to date. The possible quark structure of the P-wave diproton resonances is also discussed.