A large final-state interaction in the 0-0- decays of J/psi

TL;DR

This paper investigates the decay modes of J/psi particles, revealing a significant phase difference in final-state interactions, which has implications for understanding B decays and can be tested through specific cross-section measurements.

Contribution

It introduces an analysis of J/psi decay modes considering broken flavor SU(3) symmetry, highlighting a large phase difference in final-state interactions between decay amplitudes.

Findings

Large phase difference favored between one-photon and gluon decay amplitudes

Analysis suggests significant long-distance final-state interactions

Measurement of specific cross sections can confirm the findings

Abstract

In view of important implications in the B decay, the 0-0- decay modes of J/psi are analyzed with broken flavor SU(3) symmetry in search for long-distance final-state interactions. If we impose one mild theoretical constraint on the electromagnetic form factors, we find that a large phase difference of final-state interactions is strongly favored between the one-photon and the gluon decay amplitudes. Measurement of the \pi+\pi- and K+K- cross sections off the J/psi peak in e+e- annihilation can settle the issue without recourse to theory.