One-pion-exchange final-state-interaction and the pbar p near threshold enhancement in J/psi -> gamma pbar p decays

Preprint

24 September 2003

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/0309273

Abstract

For the Nbar N system, the one-pion-exchange (OPE) interaction gives the largest attractive force for Nbar N with isospin I=0 and spin S=0, while a near threshold enhancement was observed for pbar p with I=0 and S=0 in J/psi -> gamma pbar p decays. With a K-matrix approach, we find that the OPE final-state-interaction (FSI) makes an important contribution to the near-threshold enhancement in the pbar p mass spectrum in J/psi -> gamma pbar p decays.

Keywords

FINAL STATE INTERACTION
THRESHOLD ENHANCEMENT
STATE INTERACTION
EXCHANGE FINAL
PION EXCHANGE
GAMMA PBAR
J/PSI

All Related Versions

Version 1, 2003-09-24, ArXiv
Published version: Physical Review D, 69 (3), 034004.

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