Ms Chunyan LIU (Institute of High Energy Physics)
The mixing intensity of f0(980) and a0(980) is expected to shed light on the nature of these two resonances. The a0-f0 mixing intensity has been predicted to be in the range of 0.01 to 0.2 by various theoretical models, but no any experimental results available yet. The transition of f0(980) to a0(980) or a0(980) to f0(980) will provide complementary constraints to the parameters of a0 and f0 mesons. Using the samples of 2.25X10^8 J/Psi events and 1.06X10^8 Psi' events collected with the BESIII detector, we perform direct measurements of a0-f0 mixing via the isospin breaking processes J/Psi-->\phi f0-〉\phi a0 and Chi_c1->pi0 a0->pi0 f0. The results on the a0(980)-f0(980) mixing intensity are presented.