2008/06/28 by G. Y. Chen, H. Dong, H. R. Dong +2 · 22 citations
Physics and Astronomy · #Algorithm #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Coupling (piping) #Particle physics #Physics #Quantum Chromodynamics and Particle Interactions #Quantum and electron transport phenomena #State (computer science) #hep-ph
paper · pdf · doi:10.1103/physrevd.78.054022
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 78(5) (American Physical Society) · 11 pages with 4 figures
arxiv created 2008/06/28 · openalex publication_date 2008/09/22 · arxiv updated 2009/12/01 · openalex created_date 2017/03/16 · openalex updated_date 2026/08/05
We study the observed enhancement of a pp system near the threshold in the process J/\ensuremathψ\ensuremath→\ensuremathγpp and e+e^\ensuremath-\ensuremath→pp. From early studies the enhancement can be explained by final state interactions, which are in general taken into account with some potential models. In this work, we offer a simple approach within quantum field theory to explain the observed enhancement. We point out that among different final state interactions the rescattering in a NN system though exchange of \ensuremathπ is the most important. The effects of the rescattering is completely fixed by the well-known coupling g_\ensuremathπNN. Our results show that the enhancement in J/\ensuremathψ\ensuremath→\ensuremathγpp and e+e^\ensuremath-\ensuremath→pp can be well described with the rescattering effects.