a0(980)–f0(980) mixing in χc1 decay
1 Department of Physics, Kocaeli University 41380, Izmit, Turkey
2 Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigación de Paterna, Aptdo. 22085, 46071 Valencia, Spain
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Published online: 1 February 2019
We investigate the isospin breaking in the and decays and its relation to the a0(980) – f0(980) mixing, which was measured by the BESIII Collaboration. The isospin violation is introduced through the use of different masses for the charged and neutral kaons, either in the propagators of pairs of mesons created in the χc1 decay, or in the propagators inside the T matrix. We find that the most important effect in the total amplitude is the isospin breaking inside the T matrix which is essential to get a good agreement with the experimental measurement of the mixing.
© The Authors, published by EDP Sciences, 2019
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