Effect of the ηη channel and interference phenomena in the two-pion transitions of charmonia and bottomonia
1 Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
2 Nuclear Physics Institute of the CAS, 25068 Řež, Czech Republic
3 Institut für Theoretische Physik, Universität Tübingen, Kepler Center for Astro and Particle Physics, Auf der Morgenstelle 14, D-72076 Tübingen, Germany
4 Institute of Nuclear Physics of the PAN, Cracow 31342, Poland
5 Department of Physics, Tomsk State University, 634050 Tomsk, Russia
6 Mathematical Physics Department, Tomsk Polytechnic University, Lenin Avenue 30,, 634050 Tomsk, Russia
7 Institute of Physics, SAS, Bratislava 84511, Slovak Republic
* e-mail: firstname.lastname@example.org
Published online: 27 March 2017
The basic shape of di-pion mass spectra in the two-pion transitions of both charmonia and bottomonia states is explained by a unified mechanism based on contributions of the ππ, KK̅, and ηη coupled channels including their interference. The role of the individual f0 resonances in shaping the di-pion mass distributions in the charmonia and bottomonia decays is considered.
© The Authors, published by EDP Sciences, 2017
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