2010/04/30 by G. Y. Chen, G.Y. Chen, H. Dong +3 · 1 citation
Mathematics · Physics and Astronomy · #Computer science #High-Energy Particle Collisions Research #Mathematics #Particle physics theoretical and experimental studies #Philosophy #Quantum Chromodynamics and Particle Interactions #Scroll #Speech recognition #Stress (linguistics) #Theology #hep-ex #hep-ph #nucl-th
paper · pdf · doi:10.1016/j.physletb.2010.07.030
published as Phys.Lett.B692:136-142,2010 · Discussions and References added, Fig.2 redrawn. Published version in Phys. Lett. B
openalex publication_date 2010/07/23 · arxiv created 2010/08/11 · arxiv updated 2014/11/20 · openalex created_date 2020/05/13 · openalex updated_date 2026/08/05
The observed enhancement of p p ¯ -production near the threshold in radiative decays of J / ψ and e + e − -annihilations can be explained with final state interactions among the produced N N ¯ system, where the enhancement is essentially determined by N N ¯ elastic scattering amplitudes. We propose to use an effective theory for interactions in an N N ¯ system near its threshold. The effective theory is similar to the well-known one for interactions in an NN system but with distinctions. It is interesting to note that in the effective theory some corrections to scattering amplitudes at tree-level can systematically be summed into a simple form. These corrections are from rescattering processes. With these corrected amplitudes we are able to describe the enhancement near the threshold in radiative decays of J / ψ and e + e − -annihilations, and the p p ¯ elastic scattering near the threshold.