Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Hadron Structure and Spectroscopy 5

HK 27.7: Talk

Tuesday, March 24, 2015, 16:15–16:30, T/SR19

Towards understanding the near-threshold antiproton-proton spectra from J/ψ and ψ′ decays by the final-state interaction effects — •Xianwei Kang¹, Johann Haidenbauer¹, and Ulf-G. Meißner^1,2 — ¹Institute for Advanced Simulation and Jülich Center for Hadron Physics, Institute für Kernphysik, Foschungszentrum Jülich,Germany — ²Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics,Universität Bonn

Utilzing the Jost-function approach, we analyze all the existing data for pp spectrum up to excess energy of 100 MeV from J/ψ, ψ′ decays to γ, π, η or ω pp. For the potential used in this analysis, both the chiral potential constructed by us previously and the Jülich model A(OBE) have been considered. We have shown that the near-threshold spectrum can be described by our treatment of the final state interaction effect.